fai3 zeon6 sam1 si1費盡心思费尽心思
Jyutpingfai3 zeon6 sam1 si1
Yalefai jeunh sām sī
Definition
to rack one's brains (idiom); to take great pains to think sth through
Tone guide
T1High level
T2High rising
T3Mid level
T4Low falling
T5Low rising
T6Low level
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