lig siar, v.t. 1. Let back. Do cheann a ~ean siar, to let one’s head back. ~ siar ar do ghuaillí é, let it fall back over your shoulders. ~ siar as ár mbealach iad, let them move back out of our way. ~ sé é féin siar sa chathaoir, he leaned back in the chair. F:Bhí sé ag ~ean siar na gcluas léi, he was making up to her. 2. Swallow. Bia, deoch, a ~ean siar, to swallow food, drink.