west1 .1s.aIarthar m. House facing (the) west, teach agus a aghaidh siar. On the west, thiar; ar an taobh thiar. To the west, siar. From the west, aniar. The wind is in the west, tá an ghaoth thiar. bThe West, an tIarthar, an Domhan Thiar. 2adv. (Of rest) Thiar; (of motion) siar. To go west, (i) dul siar; (ii) P: bás a fháil; deireadh a bheith le (rud). West by south, north, siar lámh ó dheas, lámh ó thuaidh. 3a.(An áit) thiar; (an ghaoth) aniar.