Exhaustless

Origin

exhaust + -less

Full definition of exhaustless

Adjective

1. Unable to be exhausted; having an endless supply.
• 1830, Anna Maria Porter, The Barony (volume 3, page 460)The exhaustless conjecturings of that evening's full conversation, made such of the small party, as had hitherto been strangers, well acquainted with each other's turn of mind...
2. Of an automobile or similar machine, not producing exhaust; nonpolluting.