այդ

• էդ (ēd), էտ (ēt) – dialectal, colloquial

Learned borrowing from Old Armenian այդ (ayd). The dialectal forms are inherited.

• (Eastern Armenian, standard) IPA^(key): [ɑjd]
  • (Eastern Armenian, colloquial) IPA^(key): [ɑjt]
• (Western Armenian, standard) IPA^(key): [ɑjtʰ]

այդ • (ayd)

1. that (close to the listener)

   Տու՛ր ինձ այդ գիրքը։ ― Túr inj ayd girkʿə. ― Give me that book (which is near you).

այդ and դա (da) form a pronoun-determiner pair. See այս (ays) for more details.

• այն (ayn)
• այս (ays)
• դա (da)

From the demonstrative particle *այ- (*ay-) +‎ *դո- (*do-). For the first see այն (ayn).

այդ • (ayd)

1. (demonstrative) that (near the 2nd person)

• դա (da), դոյն (doyn)

• Armenian: այդ (ayd), ատ (at)

• այս (ays)
• այն (ayn)

• Petrosean, H. Matatʿeay V. (1879), “այդ”, in Nor Baṙagirkʿ Hay-Angliarēn [New Dictionary Armenian–English], Venice: S. Lazarus Armenian Academy
• Awetikʿean, G.; Siwrmēlean, X.; Awgerean, M. (1836–1837), “այդ”, in Nor baṙgirkʿ haykazean lezui [New Dictionary of the Armenian Language] (in Old Armenian), Venice: S. Lazarus Armenian Academy
• Ačaṙean, Hračʿeay (1971–1979), “այդ”, in Hayerēn armatakan baṙaran [Armenian Etymological Dictionary] (in Armenian), 2nd edition, a reprint of the original 1926–1935 seven-volume edition, Yerevan: University Press
• Abrahamyan, Ašot (1976) Grabari jeṙnark [A Handbook of Old Armenian] (in Armenian), 4th edition, Yerevan: Luys
• Godel, Robert (1975) An introduction to the study of classical Armenian, Wiesbaden: Dr. Ludwig Reichert Verlag, page 107