n. & v.
--n. a derisive smile or remark.
--v.
1. intr. (often foll. by at) smile derisively.
2 tr. say sneeringly.
3 intr. (often foll. by at) speak derisively esp. covertly or ironically (sneered at his attempts).
Derivatives:
sneerer n. sneeringly adv.
Etymology: 16th c.: orig. unkn.