yondë noun "any fairly extensive region with well-marked natural bonds (as mountains or rivers)", occurring as a suffix -yondë, -yon/-iondë, -ion in regional names. (PE17:43). Note: †yondë may also be an (archaic/poetic) past tense of the verb yor-, q.v.
Quenya
yondë
noun. region, any fairly extensive region with well-marked natural bounds
yondë
any fairly extensive region with well-marked natural bonds (as mountains or rivers)
Yón
region, any (fairly extensive) region between obstacles such as rivers or mountains
yón (2), variant of yondë, q.v. Defined as "a region, any (fairly extensive) region _between obstacles such as rivers or mountains" (PE17:43)_
yor-
verb. enclose, set bounds to/about
yor- vb. "enclose, set bounds to/about" (PE17:43). Past tense yórë, †yondë, perfect oiórië (PE17:43). The forms yonda, yonna "enclosed" may be regarded as the passive participle of this verb.
ména
region
ména noun "region" (MEN). Not to be confused with the present/continuative tense of #men- "go".
yor-
verb. to enclose, set bounds to/about, to enclose, set bounds to/about; *to include, contain
@@@ extended meaning “include, contain” from NQ-Wiki, also suggested by Tamas Ferencz
yón
noun. region
@@@ yonde is salvageable as a derivative of YOD