Cydwysiad, n. convocation
Cydyfed, v. to drink together
Cydymattal, to abstain mutually
Cydymaith, n. a companion; v. to accompany
Cydymdeimlad, n. mutual sympathy
Cydymdeithas, n. company
Cydymdeithasu, v. mutually to asscociate
Cydymdrafodi, v. to strive mutually
Cydymddiried, n. mutual trust
Cydymddwyn, to bear mutually