「啞老師」

(pos:名詞)
<explanation>
yue:借喻#辭典
eng:metaphor for a dictionary; literally "dumb (i.e. mute) teacher"
<eg>
yue:係時候請教下啞老師。 (hai6 si4 hau6 ceng2 gaau3 haa5 aa2 lou5 si1.)
eng:It's time to consult the silent teacher (the dictionary).