past tense of tread (v.).

archaic past tense of beget.

past tense of wake (v.).

"continuous bending, the essential characteristic of a curve," 1660s, from Latin curvatura "a bending," from curvatus, past participle of curvare "to bend," from PIE root *sker- (2) "to turn, bend." In non-Euclidian geometry, from 1873.

past tense of bite.

past tense of forsake.

past tense of forbid.

past tense of fly (v.1).

modern past tense of wear (v.).

past tense and past participle of behold.