https://en.wikipedia.org/wiki/Thaana
Thaana, Taana or Tāna ( ތާނަ) is the present writing system of the Maldivian language spoken in the Maldives.Thaana has characteristics of both an abugida (diacritic, vowel-killer strokes) and a true alphabet (all vowels are written), with consonants derived from indigenous and Arabic numerals, and vowels derived from the vowel diacritics of the Arabic abjad.