diff --git a/scripts/unicode.py b/scripts/unicode.py
index 537a1db..80affa5 100755
--- a/scripts/unicode.py
+++ b/scripts/unicode.py
@@ -241,6 +241,21 @@ def load_zero_widths() -> "list[bool]":
     # width 2. Therefore, we treat it as having width 2.
     zw_map[0x115F] = False
 
+    # Syriac abbreviation mark:
+    # Zero-width `Prepended_Concatenation_Mark`
+    zw_map[0x070F] = True
+
+    # Some Arabic Prepended_Concatenation_Mark`s
+    # https://www.unicode.org/versions/Unicode15.0.0/ch09.pdf#G27820
+    zw_map[0x0605] = True
+    zw_map[0x0890] = True
+    zw_map[0x0891] = True
+    zw_map[0x08E2] = True
+
+    # U+A8FA DEVANAGARI CARET
+    # https://www.unicode.org/versions/Unicode15.0.0/ch12.pdf#G667447
+    zw_map[0xA8FA] = True
+
     return zw_map
 
 
diff --git a/src/lib.rs b/src/lib.rs
index ab8a8a1..8e3c4ab 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -57,6 +57,13 @@
 //!      - [`'\u{1B43}'` BALINESE VOWEL SIGN PEPET TEDUNG](https://util.unicode.org/UnicodeJsps/character.jsp?a=1B43).
 //!    - [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BHangul_Syllable_Type%3DV%7D%5Cp%7BHangul_Syllable_Type%3DT%7D)
 //!       with a [`Hangul_Syllable_Type`] of `Vowel_Jamo` (`V`) or `Trailing_Jamo` (`T`).
+//!    - The following [`Prepended_Concatenation_Mark`]s:
+//!      - [`'\u{0605}'` NUMBER MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0605),
+//!      - [`'\u{070F}'` SYRIAC ABBREVIATION MARK](https://util.unicode.org/UnicodeJsps/character.jsp?a=070F),
+//!      - [`'\u{0890}'` POUND MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0890),
+//!      - [`'\u{0891}'` PIASTRE MARK ABOVE](https://util.unicode.org/UnicodeJsps/character.jsp?a=0891), and
+//!      - [`'\u{08E2}'` DISPUTED END OF AYAH](https://util.unicode.org/UnicodeJsps/character.jsp?a=08E2).
+//!    - [`'\u{A8FA}'` DEVANAGARI CARET](https://util.unicode.org/UnicodeJsps/character.jsp?a=A8FA).
 //! 7. [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BEast_Asian_Width%3DF%7D%5Cp%7BEast_Asian_Width%3DW%7D)
 //!    with an [`East_Asian_Width`] of [`Fullwidth`] or [`Wide`] have width 2.
 //! 8. [Characters](https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp?a=%5Cp%7BEast_Asian_Width%3DA%7D)
@@ -68,6 +75,7 @@
 //! [`Emoji_Presentation`]: https://unicode.org/reports/tr51/#def_emoji_presentation
 //! [`Grapheme_Extend`]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G52443
 //! [`Hangul_Syllable_Type`]: https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf#G45593
+//! [`Prepended_Concatenation_Mark`]: https://www.unicode.org/versions/Unicode15.0.0/ch23.pdf#G37908
 //!
 //! [`Fullwidth`]: https://www.unicode.org/reports/tr11/#ED2
 //! [`Wide`]: https://www.unicode.org/reports/tr11/#ED4
diff --git a/src/tables.rs b/src/tables.rs
index 2a4549e..521bd8e 100644
--- a/src/tables.rs
+++ b/src/tables.rs
@@ -320,18 +320,18 @@ pub mod charwidth {
         0x00, 0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x55, 0x55, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x10, 0x41, 0x10, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x00, 0x00, 0x40, 0x54, 0x55, 0x55, 0x55, 0x55, 0x55,
+        0x55, 0x55, 0x55, 0x51, 0x55, 0x55, 0x00, 0x00, 0x40, 0x54, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x55, 0x55, 0x55, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x55, 0x55, 0x55,
         0x54, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x05, 0x00, 0x14, 0x00, 0x14, 0x04,
-        0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x51, 0x55, 0x55, 0x55, 0x55, 0x55,
+        0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x15, 0x51, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x05, 0x00, 0x00, 0x54, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x55, 0x15, 0x00, 0x00, 0x55, 0x55, 0x51, 0x55, 0x55, 0x55, 0x55, 0x55, 0x05,
         0x10, 0x00, 0x00, 0x01, 0x01, 0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x01, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-        0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x05,
-        0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x55,
+        0x50, 0x55, 0x00, 0x00, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x05,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x55,
         0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x45, 0x54, 0x01,
         0x00, 0x54, 0x51, 0x01, 0x00, 0x55, 0x55, 0x05, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x51, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
@@ -438,7 +438,7 @@ pub mod charwidth {
         0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x50, 0x55, 0x55, 0x55, 0x45, 0x45, 0x15, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x41, 0x55, 0x54, 0x55, 0x55, 0x55, 0x55, 0x55, 0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
-        0x00, 0x00, 0x00, 0x00, 0x50, 0x55, 0x55, 0x15, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
+        0x00, 0x00, 0x00, 0x00, 0x50, 0x55, 0x45, 0x15, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x05, 0x00, 0x50, 0x55, 0x55, 0x55, 0x55, 0x55, 0x15, 0x00, 0x00, 0x50, 0x55,
         0x55, 0x55, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0x56, 0x40, 0x55, 0x55, 0x55, 0x55,
         0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x15, 0x05, 0x50, 0x50, 0x55, 0x55, 0x55, 0x55,
diff --git a/tests/tests.rs b/tests/tests.rs
index 57c7aed..44c2aa9 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -99,10 +99,22 @@ fn test_jamo() {
 
 #[test]
 fn test_prepended_concatenation_marks() {
-    assert_eq!('\u{0600}'.width(), Some(1));
-    assert_eq!('\u{070F}'.width(), Some(1));
-    assert_eq!('\u{08E2}'.width(), Some(1));
-    assert_eq!('\u{110BD}'.width(), Some(1));
+    for c in [
+        '\u{0600}',
+        '\u{0601}',
+        '\u{0602}',
+        '\u{0603}',
+        '\u{0604}',
+        '\u{06DD}',
+        '\u{110BD}',
+        '\u{110CD}',
+    ] {
+        assert_eq!(c.width(), Some(1), "{c:?} should have width 1");
+    }
+
+    for c in ['\u{0605}', '\u{070F}', '\u{0890}', '\u{0891}', '\u{08E2}'] {
+        assert_eq!(c.width(), Some(0), "{c:?} should have width 0");
+    }
 }
 
 #[test]
@@ -131,6 +143,11 @@ fn test_marks() {
     assert_eq!('\u{09BE}'.width(), Some(0));
 }
 
+#[test]
+fn test_devanagari_caret() {
+    assert_eq!('\u{A8FA}'.width(), Some(0));
+}
+
 #[test]
 fn test_canonical_equivalence() {
     let norm_file = BufReader::new(