pusillanimous

US /ˌpjuː.sɪˈlæn.ə.məs/
UK /ˌpjuː.sɪˈlæn.ə.məs/
1.

hèn nhát

weak and cowardly (= not brave); frightened of taking risks:

:
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He's too pusillanimous to stand up to his opponents.