Webster's Revised Unabridged Dictionary · 1913

Conspire

Conspire (kon*spīr") , intransitive verb

[French conspirer, Latin conspirare to blow together, harmonize, agree, plot; con- + spirare to breathe, blow. See Spirit.]

1.
To make an agreement, esp. a secret agreement, to do some act, as to commit treason or a crime, or to do some unlawful deed; to plot together.
They conspired against [Joseph] to slay him. — Gen. xxxvii. 18
You have conspired against our royal person, Joined with an enemy proclaimed. — Shakespeare
2.
To concur to one end; to agree.
The press, the pulpit, and the stage Conspire to censure and expose our age. — Roscommon

Conspire , transitive verb

To plot; to plan; to combine for.
Angry clouds conspire your overthrow. — Bp. Hall