加气

加气	jiā qì	to aerate / to ventilate
加	Jiā	Canada (abbr. for 加拿大) / surname Jia
加	jiā	to add / (math.) plus / to increase; to augment / (used before a disyllabic verb, often after an adverb like 不, 大, 稍 etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良 "make some minor improvements to (it)")
气	qì	gas; air / smell / weather / to make angry; to annoy; to get angry / vital energy; qi