Kha (Bengali)
The Bengali letter খ is derived from the Siddhaṃ, and is marked by the lack of a horizontal head line, unlike its Devanagari counterpart, ख. The inherent vowel of Bengali consonant letters is /ɔ/, so the bare letter খ will sometimes be transliterated as "kho" instead of "kha". Adding okar, the "o" vowel mark, খো, gives a reading of /kho/.
Like all Indic consonants, খ can be modified by marks to indicate another vowel than its inherent "a".