Conspire
Definition 1 of 2
Pro Tip 1/3
Negative actions
'Conspire' often involves plans to harm someone or something, or break the law. The corrupt officials conspired to embezzle funds.
Pro Tip 2/3
Secretive nature
Plans made when conspiring are usually kept secret from outsiders. The thieves conspired in hushed tones, glancing around nervously.
Pro Tip 3/3
Group activity
'Conspire' implies that more than one person is involved in making the plans. The siblings conspired to surprise their parents with a party.