great-great-grandfather (the father of someone's great-grandparent)

Kyūjitai form of 竜涎香 (“ambergris”)

a traffic accident

(military) anti-aircraft gun, anti-aircraft cannon

(linguistics) Synonym of 統語論 (tōgoron): syntax (as a field of study), syntactics

(film, audio or video recording) special effects

a grand duchy

Kyūjitai form of 大公国 (“grand duchy”)

Short for 弘法大師 (Kōbō Daishi): the posthumous name of 空海 (Kūkai), founder of the esoteric Shingon sect of Buddhism / a surname

(photography) a wide-angle lens