儀 is built from the 亻 (person (left)) and 義 components.
It reads ギ like 義, as do 議 and 犠 — learn 義 once and the family's reading comes with it.
A common word using 儀 is 儀式 (ぎしき), meaning “ceremony, rite, ritual”.
Kanji that look similar include 億, 像, 僕, and 僚.
