里应外合 lǐyìngwàihé to collaborate from within Origin Definitions Defs Strokes Stroke Words Sentences Sents 里 裡 lǐ locative inside internal; interior; inside应 應 yìng verbnoun to suit (bound form) to suit; to respond to; to comply with外 wài locative outside outside; exterior; the space or position beyond a certain limit or boundary合 hé verbadjective to fit to conform to; to suit; to be in accord with; to match