larks is a form of:

Lark



noun
1.
(any of several small sandy brown birds, a similar North American bird, the meadow lark) go on a lark ទៅលេងយ៉ាងសប្បាយរីករាយ
ENGLISH MEANING
noun
1.
A frolic; a jolly time.
2.
Any one numerous species of singing birds of the genus Alauda and allied genera (family Alaudidae). They mostly belong to Europe, Asia, and Northern Africa. In America they are represented by the shore larks, or horned by the shore larks, or horned larks, of the genus Otocoris. The true larks have holaspidean tarsi, very long hind claws, and usually, dull, sandy brown colors.
verb
1.
(INTRANSITIVE) To catch larks; as, to go larking.
1.
To sport, to frolic