How do you pronounce 初?

Q: How do you pronounce 初? A: co1, e.g.

初 (co1) — meaning, pronunciation, examples

初 (co1, chū) — at first; (at the) beginning; first; junior; basic; original; initial

初一流流 (co1 jat1 lau4 lau4) — during good mood from festivities over first day of the new year
初不初 (co1 bat1 co1) — At the begining
初交 (co1 gaau1) — new acquaintance
初初 (co1 co1) — in the very beginning
初吻 (co1 man5) — First kiss
初哥 (co1 go1) — (noun) a beginner; a novice; a neophyte