ceangail ar, v.t. 1. Bind, tie, upon; fasten to, on. Cheangail sé a chlaíomh air féin, he girded on his sword. ~ ar rópa é, fasten it to a rope. ~ ar stáca é, fasten it on a stake. 2. Invoke as surety for. Cheangail sé grian agus gealach air féin, he swore by the sun and the moon.