excerpts from :
The Bible Knowledge Commentary
based on NIV
John F. Walvoord
Roy B. Zuck
Isaiah 34:9-17
As a result of God's sword of judgement on Edom, her land will seem to be ablaze (cf. Obad. 18) with sulfur (see comments on Isa. 30:33) and burning pitch, a tar-like substance seemingly unquenchable. The land will lie desolate for many generations (34:10; cf. v.11). Edoms cities and territories will be inhabited by wild birds and animals which do not normally inhabit populated villages and towns.......
for ever and ever, in this context:
H5331
נצח נצח
netsach nêtsach
neh'-tsakh, nay'-tsakh
From H5329; properly a goal, that is, the bright object at a distance travelled towards; hence (figuratively), splendor, or (subjectively) truthfulness, or (objectively) confidence; but usually (adverbially), continually (that is, to the most distant point of view): - alway (-s), constantly, end, (+ n-) ever (more), perpetual, strength, victory.
Rev 14:11 And the smoke of their torment goes up forever and ever. And they have no rest day or night, those who worship the beast and its image, and whoever receives the mark of its name.
forever and ever in this context:
G165
αἰών
aiōn
ahee-ohn'
From the same as G104;
properly an age;
by extension perpetuity (also past); by implication the world; specifically (Jewish) a Messianic period (present or future): - age, course, eternal, (for) ever (-more), [n-]ever, (beginning of the, while the) world (began, without end). Compare G5550.
Lev 24:8 Every sabbath he shall set it in order before Jehovah forever, from the sons of Israel by an everlasting covenant.
everlasting in this context:
H5769
עלם עולם
‛ôlâm ‛ôlâm
o-lawm', o-lawm'
From H5956; properly concealed, that is, the vanishing point; generally time out of mind (past or future), that is, (practically) eternity; frequentative adverbially (especially with prepositional prefix) always: - always (-s), ancient (time), any more, continuance, eternal, (for, [n-]) ever (-lasting, -more, of old), lasting, long (time), (of) old (time), perpetual, at any time, (beginning of the) world (+ without end). Compare H5331, H5703.