Leisurely
来自Big Physics
wiktionary
From leisure + -ly.
From leisurelily, by haplology
etymonline
leisurely (adj.)
c. 1600, from leisure (n.) + -ly (1). Earlier adjectives were leisurable (1530s), leisureful (mid-15c.). Related: Leisureliness.
leisurely (adv.)
late 15c., "not hastily, deliberately," from leisure (n.) + -ly (2).