緑化 りょっか Also written りょくか Meanings Noun, する verb, Transitive greening (i.e. planting to increase greenery); tree planting; afforestation Kanji 緑 green. Read as リョク. 化 transform. Read as カ. Words containing 緑化 緑化屋根 (りょくかやね) roof garden Jinuma: Japanese Dictionary · Word lists