通知

通知	tōng zhī	to notify / to inform / notice / notification / CL:个
通	tōng	to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc
通	tòng	classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)
知	zhī	to know / to be aware