I . a.
Unpremeditated, unstudied, extempore, free and easy, impromptu .
II . ad.
Extempore, at the moment, on the spur of the moment, without premeditation or study, readily, with ease, impromptu .
I . a.
Unpremeditated, unstudied, extempore, free and easy, impromptu .
II . ad.
Extempore, at the moment, on the spur of the moment, without premeditation or study, readily, with ease, impromptu .
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012