Complex sentence: The word was first used in the 840s in the Irish annals and describes new Viking settlements established at Waterford in 914 and Limerick in 922 possibly by the Uí Ímair.
Split into simpler sentences: The word was first used in the 840s in the Irish annals. It describes new Viking settlements established at Waterford in 914 and Limerick in 922 possibly by the Uí Ímair.