通通

all / entire / complete

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

ordinary / mediocre / nothing special

variant of 紅彤彤|红彤彤[hong2 tong1 tong1]