「欲言又止」

(pos:語句)
<explanation>
yue:想講但又講唔出口
eng:to bite something back; to want to say something but then hesitate
<eg>
yue:佢望住我欲言又止，最後都係乜都冇講。 (keoi5 mong6 zyu6 ngo5 juk6 jin4 jau6 zi2, zeoi3 hau6 dou1 hai6 mat1 dou1 mou5 gong2)
eng:He looked at me and wanted to say something, but then hesitated and eventually said nothing.