lark 2 
(lärk)
(lärk)n.
1. A carefree or spirited adventure.
2. A harmless prank.
intr.v. larked, lark·ing, larks
To engage in spirited fun or merry pranks.
[Short for SKYLARK, to frolic, or alteration of dialectal lake, play (from Middle English leik, laik, from Old Norse leikr).]
larker n.
larkish adj.
larky adj.
- forehand
- forehanded
- forehandedly
- forehandedness
- forehead
- foreign
- foreign affairs
- foreign aid
- foreign-born
- foreign correspondent
- foreigner
- foreign exchange
- foreignism
- foreign legion
- foreign minister
- foreign mission
- foreignness
- foreign office
- foreign policy
- Foreign Service
- forejudge
- forejudgment
- foreknow
- foreknowledge
- forelady