inform

[1]	tell , apprise , advise , communicate , enlighten , notify , acquaint , brief , impart , disclose , divulge , reveal , report , (Colloq) tip (off)
[2]	inform against/on , betray , incriminate , implicate , identify , (Colloq) tell (on) , blab (on) , rat (on) , (US) blow the whistle (on) , (Slang) peach (on) , snitch (on) , squeal (on) , put the finger on , sing , name names , (Brit) nark (on) , grass (on) , split on , (US) finger