議 is built from the 言 and 義 components.
It reads ギ like 義, as do 儀 and 犠 — learn 義 once and the family's reading comes with it.
A common word using 議 is 会議 (かいぎ), meaning “business meeting; conference”.
Kanji that look similar include 譲, 護, 識, and 譜.