自底向上 zìdǐxiàngshàng bottom-up Origin Definitions Defs Strokes Stroke Words Sentences Sents 自 zì preposition from from; since; used in formal or written contexts to indicate a starting point in time or space底 dǐ nounlocative bottom The lowest part of an object or body of water; base; foundation向上 xiàngshàng adverbadjective upward moving, pointing, or looking in a higher direction; up