山積 さんせき Meanings Noun, する verb, Intransitive piling up; accumulating; forming a (huge) pile; lying in piles Kanji 山 mountain. Read as サン. 積 pile up. Read as セキ. Common phrases 課題が山積する 問題が山積する Words containing 山積 難問山積 (なんもんさんせき) mountain (pile) of difficult problems Jinuma: Japanese Dictionary · Word lists