逓 - relay, in turn, sending

post office

relay

forwarding

delivery of packages; postal service

step-down transformer

Ministry of Communications and Transportation (dissolved in 1949)

Minister of Communications and Transportation (1885-1949)

gradual increase

gradual decrease; gradual diminution

communications (e.g. post, telegraph)

multiplication (e.g. of frequencies)

multiplier (e.g. frequency)