CONSPIRE

verb (~d; conspiring) Etymology: Middle English, from Anglo-French ~r, from Latin conspirare to be in harmony, ~, from com- + spirare to breathe Date: 14th century transitive verb plot , contrive , intransitive verb 1. to join in a secret agreement to do an unlawful or wrongful act or an act which becomes unlawful as a result of the secret agreement , scheme , to act in harmony toward a common end