プログレッシブ和英中辞典(第4版)の解説
せいぜい【精精】
❶〔できるだけ〕
せいぜい勉強しなさい
Study as hard as you can.
せいぜいおまけしておきますよ
I'll reduce the price as much as possible.
せいぜいお体をお大事に
Do take (very) good care of yourself.
❷〔多く見積もって，高々〕at (the) most; at best；〔否定文で〕not more than
少女はせいぜい10歳ぐらいだったと思う
I think the girl was ten at (the) most.
出願者はせいぜい500人ぐらいだろう
There will be only about 500 applicants 「at the most [at best].／There won't be more than 500 applicants.
後で地団太を踏むのがせいぜいだろう
At most, all he'll be able to do is stamp in vexation later.
この機械が持つのはせいぜい３年くらいでしょう
This machine will last for three years at the longest [《口》 outside].
せいぜい60点しかあげられない
I cannot give you more than sixty for your work.／A sixty is about all I can give you.