Is it ensure, insure, or assure?
1560s, from Latin selectus, past participle of seligere "choose out, single out, select; separate, cull," from se- "apart" (see secret (n.)) + legere "to gather, select" (see lecture (n.)). The noun meaning "a selected person or thing, that which is choice" is recorded from c.1600. New England selectman first recorded 1640s.
1560s, from select (adj.) or from Latin selectus. Related: Selected; selecting.
1. In Smalltalk or Objective C, the syntax of a message which selects a particular method in the target object.
2. An operation that returns the state of an object but does not alter that state. Selector functions or methods often have names which begin with "get" and corresponding modifier methods or procedures whose names begin with "set".