The sign for "communication" uses "C" handshapes.
Alternate moving the "C" hands forward and backward from near the mouth:
COMMUNICATE / communication
COMMUNICATION (video clip)
Notes:
"COMMUNICATION / COMMUNICATE" is an initialized version of the sign
"talking with."
See: TALK-WITH.
INTERVIEW: If you initialize the sign "TALK-WITH" by using "I" hands instead of "index
fingers" the sign will mean "interview."
See: INTERVIEW
Also see: TOTAL-COMMUNICATION