Long lasting to temporary

immutable
(adj)
im-YOO-tǝ-bǝll
Meaning

unchangeable; not capable of being changed

1st Sample Sentence

The laws of nature are immutable, so far as we know.

Root

in (not, opposite of)#mutare (to change) (Latin)

Synonyms

enduring, immutable, perennial

Antonyms

ephemeral, evanescent, transient, transitory

Mnemonics

mutation implies changes in genes etc. Therefore, it is im (non) + mutable ie cannot change immutable is something immune to changes

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