共は英語で
sym-

英語の定義

共
1. n. both, all
2. prefix. co-
3. suffix. altogether
4. suffix. ...included
送料共 - including shipping fees, including postage
5. suffix. indicates plural
6. suffix. Usage: Affixing 共 to oneself indicates humbleness. Affixing 共 to other people is disrespectful compared to 達 (たち, -tachi).