tiomain, v.t. & i. (pres. -mnann; vn. ~t f, gs. & pp. -anta).1 = tiomnaigh1. 2. Curse, swear. Bhí sé ag ~t orainn, he was swearing at us. Thiomain sé nach ndéanfadh sé arís é, he swore he wouldn’t do it again. Thiomain sé iad uile, he cursed the lot of them. ~ don diabhal iad, tell them to go to the devil.