Erth, n. an effort, a push
Erthiad, n. a making effort
Erthrwch, n. a tear, anguish
Erthu, v. to make effort
Erthwch, n. a puffing
Erthychain, v. to puff; to groan
Erthrychiad, n. a puffing
Erthrychu, v. to mangle
Erthyl, n. an abortion, untimely birth
Erthyliad, n. abortion