Synonyms:
elfin, elfish, elvish
Meaning: usually good-naturedly mischievous; "perpetrated a practical joke with elfin delight"; "elvish tricks"
Usage examples
The fact was that, as a rule, Miss Minchin's pupils were rather dull, matter-of-fact young people, accustomed to being rich and comfortable; and Sara, with her elfish cleverness, her desolate life, and her odd habit of fixing her eyes upon them and staring them out of countenance, was too much for them.