axo noun "bone"; pl. axor in Markirya
Primitive elvish
askō Reconstructed
noun. bone
askōlimā
adjective. equivalent, (lit.) beside-bear-able
Quenya
axo
noun. bone
arcólima
adjective. equivalent, (lit.) beside-bear-able
axo
bone
Sindarin
ach
noun. bone
asgolui
adjective. equivalent, (lit.) beside-bear-able
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
Qenya
asto
noun. bone
Early Noldorin
asg
noun. bone, bone; [G.] stone of fruit
A word appearing as ᴱN. asg “bone” in Early Noldorin Word-lists of the 1920s (PE13/137, 160). G. asg “bone” also appeared in the Gnomish Lexicon of the 1910s with a variant form asc and the glosses “bone (especially of other animals, rarely of men); stone of fruit” (GL/20). This 1910s form was clearly related to ᴱQ. as “bone” from the contemporaneous Qenya Lexicon (QL/33).
Neo-Sindarin: In the 1960s, Tolkien used the Quenya word axo for bone (MC/223) and Fiona Jallings suggested ᴺS. ach as its Sindarin equivalent. Unfortunately, that clashes with attested S. ach “neck” (PE17/92), so I prefer to retain ᴺS. asg for “bone”, and assume it is derived from primitive ✱ᴺ✶askō, where the primitive sk became sg in Sindarin, just as it did in earlier iterations of the language.
Gnomish
hûn
noun. bone
A noun for “bone” in the Gnomish Lexicon of the 1910s, used “especially of men and eldar” (GL/49), as opposed to G. asg “bone” used mostly of animals.
Early Quenya
as
noun. bone
hón(a)
noun. bone
A word for “bone” appearing in the Markirya poem from the 1960s in its plural form axor (MC/222-223). It might be related (conceptually if not etymologically) to the root √AKAS “neck, ridge” (PE17/92).
Conceptual Development: A similar word ᴱQ. as (ass-) bone dates all the way back to the Qenya Lexicon of the 1910s (QL/33). The locative plural of this noun assari “of bones” appeared in the Oilima Markirya poem written around 1930. The form ᴹQ. astŭ- “bone” appeared in the Declension of Nouns from the early 1930s (PE21/27).
Neo-Quenya: While this word could be derived from ✱aksō, I prefer to assume it is derived from ✱ᴺ✶askō with metathesis sk > ks in Quenya. This makes it more etymologically distinct from axë “neck” and also allows a (Neo) Sindarin form ᴺS. asg “bone”, since a Sindarin derivative of ✱aksō would collide with S. ach “neck”.