sell someone/yourself/something short
US /sel ˈsʌm.wʌn/jʊərˈself/ˈsʌm.θɪŋ ʃɔrt/
UK /sel ˈsʌm.wʌn/jʊərˈself/ˈsʌm.θɪŋ ʃɔrt/

1.
低估, 小看
to underestimate or undervalue someone or something
:
•
Don't sell yourself short; you have a lot of valuable skills.
不要低估自己;你有很多寶貴的技能。
•
It would be a mistake to sell them short in this competition.
在這場比賽中低估他們將是一個錯誤。