1 adjective very importantríthábhachtach adj1 c m uthar a bheith tábhachtachbarrthábhachtach adj1 c m uhe has a crucial role to playtá ról ríthábhachtach aigeit's crucial for their survivaltá sé ríthábhachtach chun go mairfidh siadit's crucial to recognise that it happenstá sé thar a bheith tábhachtach a aithint go dtarlaíonn sé2 adjective critical, decisivecinniúnach adj1 c m uthe crucial vote was castcaitheadh an vóta cinniúnachImportant? It's absolutely crucial.Tábhachtach? Is é an ní is tábhachtaí ar fad é.