offhand

一时、当下、立刻常与 can't、couldn't 连用

I can't tell you offhand how much the repairs will cost.

我一时说不出这些维修要花多少钱。

随口、不加思索

Offhand, I'd guess about thirty people attended the talk.

我随口猜，大概有三十个人去听那场演讲。

漫不经心地、随便地

She mentioned her promotion quite offhand during lunch.

她在午餐时很随口地提到自己升职的事。

即席的、未经准备的、随口的

His offhand remark about the budget caused real confusion.

他关于预算的那句随口之言造成了不小的混乱。

冷淡的、不客气的、态度随便的贬义

The clerk was rather offhand with customers who asked questions.

那名员工对提问的客人态度相当冷淡。