An archaic word for “sea” which fell out of use to due conflict with “holy” words like aira or airë; it was a noun form of primitive ✶gaı̯ră (PE17/27). The more common modern word for “sea” is ëar.
Conceptual Development: ᴹQ. aire “sea” appeared in The Etymologies of the 1930s as a derivative of ᴹ√AYAR (Ety/AY); it appeared beside a form ᴹQ. airen that might be a genitive form, or might be a longer form; see the entry on ᴹQ. airon for discussion.
airë (2) noun "sea" (the form airen is given, intended as a genitive singular when Tolkien wrote this; in LotR-style Quenya it would rather be a dative sg.) (AYAR/AIR; cf. airon)