Trušas

Cf. Rabbit, Rabbit, Rabbit (see). The origin of root manure is not entirely clear. It could also be from rabbit (see Rabbit). Further, cf. polish Trusz, Truszewic(z), Truszowic(z), Truszowski (SSNO V 472-473), bRuss. Tpуш ¹, Ukr. Tpуш, Tpушевич ², Russian. Tpушин ³.♦ Probably just from lit. fertilizer, fertilizer „kailinis and mėsinis auginamas and laukinis graužikas (Oryctolagus cuniculus)“ (LKŽe).