底根儿 dǐgēn'er bottom Origin Definitions Defs Strokes Stroke Words Sentences Sents dǐgēn'er bottom 底 dǐ nounlocative bottom The lowest part of an object or body of water; base; foundation根儿 根兒 gēnr base The lower part or bottom of an objectdǐgēn'er all along 底 dǐ adverb ins and outs The truth behind a matter; the underlying details or background information根儿 根兒 gēnr origin The source, origin, or cause of something.