impromptu
名词 impromptu:
an extemporaneous speech or remark
a short musical passage that seems to have been made spontaneously without advance preparation
形容词 impromptu:
with little or no preparation or forethought
同义词:ad-lib, extemporaneous, extemporary, extempore, offhand, offhanded, off-the-cuff, unrehearsed
副词 impromptu:
without advance preparation
同义词:ad lib, ad libitum, spontaneously