IPA: /dʒɛˌstɪk.jʊˈleɪ.ʃən/
KK: /dʒɛˌstɪkjuˈleɪʃən/
A deliberate and energetic movement of the hands or arms, often used to express ideas or emotions while speaking.
During his speech, he used a lot of gesticulation to emphasize his points.
Gesticulation → It is formed from "gestus" (meaning gesture) and "-culum" (a suffix indicating a noun). The word refers to the act of making gestures, especially while speaking, to convey meaning or emotion.
Think of 'gestures' when you communicate — 'gestus' means gesture, and the '-culum' indicates the action of making those gestures.