unlatch

As a verb unlatch

is remove from a latch.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As verbs the difference between unlock and unlatch

is that unlock is to undo or open a lock or something locked by, for example, turning a key, or selecting a combination while unlatch is remove from a latch.

As verbs the difference between open and unlatch

is that open is to make something accessible or remove an obstacle to its being accessible while unlatch is remove from a latch.

As an adjective open

is which is not closed; accessible; unimpeded; as, an open gate.

As a noun open

is a sports event in which anybody can compete; as, the Australian Open.

As verbs the difference between unlatch and unwatch

is that unlatch is remove from a latch while unwatch is (rare) to undo the watching of something; to unsee.

As verbs the difference between unlatch and unmatch

is that unlatch is remove from a latch while unmatch is to separate a matching pair.