1. ad-lib, extemporaneous, extemporary, extempore, impromptu, off-the-cuff, offhand, offhanded, unrehearsed

with little or no preparation or forethought

Example Sentences:
'his ad-lib comments showed poor judgment'
'an extemporaneous piano recital'
'an extemporary lecture'
'an extempore skit'
'an impromptu speech'
'offhand excuses'
'trying to sound offhanded and reassuring'
'an off-the-cuff toast'
'a few unrehearsed comments'

• ad-lib
• extemporaneous
• extemporary
• extempore
• impromptu
• off-the-cuff
• offhanded
• unrehearsed

2. offhand, offhanded

casually thoughtless or inconsiderate

Example Sentences:
'an offhand manner'
'she treated most men with offhand contempt'

• offhanded

3. offhand, offhanded, offhandedly

without previous thought or preparation

Example Sentences:
'couldn't give the figures offhand'
'we decided offhand to go to Canada'
'she had made these remarks offhandedly'

• offhanded
• offhandedly

4. offhand, offhanded, offhandedly

in a casually inconsiderate manner

Example Sentences:
'replied offhand, his mind a million miles away'
'she threw him over offhandedly without even a Dear-John letter'

• offhanded
• offhandedly