gutabira (-tabiye)     v    to fertilize
fertilize    kwōrohereza, gutabira
En-En dictionary 
improve    (another's work) guhīngūra
(physically or otherwise) kwōroherwa
(to begin to feel better after being ill) gutenzukirwa
(soil) gutabira
(taste of food) kuryosha
(a technique) guteza imbere
(ubuhinga)
En-En dictionary