How do you pronounce 臥底?

Q: How do you pronounce 臥底? A: ngo6 dai2, e.g.

臥底 (ngo6 dai2) — meaning, pronunciation, examples

臥底 (ngo6 dai2, wò dǐ) — to hide (as an undercover agent); an insider (in a gang of thieves); a mole

臥薪嘗膽 (ngo6 san1 soeng4 daam2) — endure hardship to accomplish an ambition
臥底行動 (ngo6 dai2 hang4 dung6) — an undercover operation; a sting operation [written and colloquial]
臥 (ngo6) — to lie; to crouch; to sleep; to rest
臥不安 (ngo6 bat1 on1) — restless insomnia
臥位 (ngo6 wai2) — berth
臥佛 (ngo6 fat6) — reclining Buddha