咬字眼[yǎo zì yǎn]
词典b
1. 请仔细咬清字眼说吧。 Speak your words carefully.
2. 约翰咬着嘴唇，极力寻找着一个合适的字眼。 John bit his lip, searching for the right expression.
3. 他声音很低但字眼咬得很清楚。 Although in a low voice, he enunciated every word clearly.