1 adjective disastroustubaisteach adj1 c m ua catastrophic earthquakecrith talún tubaisteachcatastrophic lossescaillteanais thubaisteacha2 adjective involving major changeollmhór adj1 c m uthese years saw catastrophic social upheavalbhain réabadh ollmhór sóisialta leis na blianta sin3 adjective unfortunate, unsuccessfultubaisteach adj1 c m uuafásach adj1 c m uainnis adj1 c m uthe party turned out to be catastrophictharla gur tubaiste ghlan a bhí sa chóisir, bhí an chóisir go hainnis