His intentional interruption of the leader's speech at the meeting was seen as a provocation.

provocation 是名词，来自动词 provoke（挑衅、激怒）。provoke 由前缀 pro-（向前）和词根 voke（呼喊、召唤）组成，字面意思是"向前呼喊"，引申为"挑衅、激怒"的行为。provocation 指"挑衅行为或挑衅性言论"。