-acht

== Irish == === Alternative forms === -eacht (slender variant) -ocht (following í) === Etymology === From Old Irish -acht (compare Scottish Gaelic -achd). === Suffix === -acht f Nominal suffix, used to form abstract ideas or nouns roughly corresponding to English -ness, -hood, -ity, or -ure. ==== Usage notes ==== This affix forms feminine nouns of the third declension. Abstract nouns do not have plural forms; however, concepts that refer to concrete items do have plurals in -aí. ==== Declension ==== Abstract nouns: Concrete nouns: ==== Derived terms ==== == Old Irish == === Etymology === From Proto-Celtic *-axtā, suffixal use of Proto-Celtic *axtā. === Suffix === -acht f -ness, -hood; forms abstract nouns. ==== Usage notes ==== After a palatalised consonant, the suffix becomes -echt. ==== Inflection ==== ==== Derived terms ==== ==== Descendants ==== Irish: -acht Manx: -aght Scottish Gaelic: -achd