曲る

Etymology 1
A denominal verb, from noun.

Verb

 * 1)   to tease, to make fun of, to make a fool of, to ridicule, to mock
 * 2)   to joke around, to kid, to talk around a subject; to speak kindly or gently
 * 3)   to perform an acrobatic stunt or trick
 * 1)   to perform an acrobatic stunt or trick

Etymology 2
Uncommon variant spelling for, omitting the from the okurigana.