Ymgynulliad, n. a self-collecting, mutual self-collecting
Ymgynig, v. to offer one’s self
Ymgyrchu, v. to approach mutually; to assault each other
Ymgyrhaedd, v. to reach one’s self
Ymgystadlu, v. to make one’s self equal
Ymgysgodi, v. to shelter one’s self; to shelter each other
Ymgysylltu, v. to conjoin one’s self; to connect mutually
Ymgysuro, v. to comfort one’s self; to comfort each other
Ymgyweirio, v. to put one’s self in order
Ymgywilyddio, v. to shame one’s self; to shame each other