achtainiam

Irish

Etymology

From Ancient Greek ἀκτίς (aktís, “ray”) + -iam.

Noun

achtainiam m (genitive singular achtainiam)

1. actinium

Declension

Declension of achtainiam (fourth declension, no plural)

bare forms case singular nominative achtainiam vocative a achtainiam genitive achtainiam dative achtainiam forms with the definite article case singular nominative an t-achtainiam genitive an achtainiam dative leis an achtainiam don achtainiam

Related terms

• achtainíd
• achtanach (“actinic”, adjective)
• achtanacht

Mutation

Mutated forms of achtainiam

radical	eclipsis	with h-prothesis	with t-prothesis
achtainiam	n-achtainiam	hachtainiam	t-achtainiam

Note: Certain mutated forms of some words can never occur in standard Modern Irish.
All possible mutated forms are displayed for convenience.

Further reading

• Ó Dónaill, Niall (1977) “achtainiam”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN
• “actinium”, in New English-Irish Dictionary, Foras na Gaeilge, 2013–2025
• Foclóir Eolaíochta