éifeachtacht

== Irish == === Etymology === From éifeacht (“force, significance; efficacy, effect; value, importance; achievement, success”) +‎ -acht (abstract suffix). === Noun === éifeachtacht f (genitive singular éifeachtachta) efficacy, effectiveness efficiency, competence ==== Declension ==== ==== Synonyms ==== (effectiveness): críochnúlacht (efficiency): éifeachtúlacht ==== Antonyms ==== neamhéifeachtacht ==== Related terms ==== éifeachtach (“forceful, significant; efficacious, effective; important; great, powerful; highly capable”, adjective) éifeachtúil (“effectual”, adjective) === Mutation === === References === Ó Dónaill, Niall (1977), “éifeachtacht”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN