lark + -ish
larkish (comparative more larkish, superlative most larkish)
- joky; mischievously high-spirited
2009 June 19, Nate Chinen, “Territory of Two Norwegian Trumpeters”, in New York Times:
What kept his devices from feeling larkish was a sly vocal intimation: even at his most weirdly expressive, Mr. Henriksen seemed to be speaking or singing through his horn.