vacillator

Từ điển WordNet v3.1 - WordNet Dictionary

noun

one who hesitates (usually out of fear)
• Syn:
waverer, hesitator, hesitater
• Derivationally related forms:
hesitate (for: hesitater), hesitate (for: hesitator), vacillate, waver (for: waverer)
• Hypernyms:
coward