man / Short for 人造 (jinzō): artificial, synthetic

counter for number of people

human / person

灰塵: ash and dust; something worthless / 灰燼: ash and cinders / 怪人: someone mysterious (in a negative way) / 芥塵: trash, rubbish / 海人: someone who lives by the sea; a fisherman or fisherwoman

開催: holding a conference or event

亜酸化窒素: nitrous oxide

meeting, gathering / society, association, club

階級: class, rank, grade / 懐旧: recalling the old days, nostalgia, reminiscences

be big and round

having something all to oneself