Related words 永えい 遠えん 永遠 is a noun/adjective meaning 'eternity' or 'eternal', used more broadly and independently. 常 is a prefix that attaches to other nouns to mean 'constant' or 'unchanging'.
不ふ 変へん 不変 is a noun/adjective meaning 'unchanging' or 'immutable', often used in formal or technical contexts. 常 is a prefix with a similar meaning but is more poetic and limited to compounds.
Word family· 10 everlasting summer; eternal summer
eternity; permanence; forever
everlasting darkness; eternal night
eternalness; forever unchanging · distant land over the sea; world of the dead
perpetual night; eternal darkness · continuing all night; all-night
Show 5 more Show fewer everlasting spring; eternal spring
Sulculus diversicolor supertexta; a species of abalone
eternally flowering flower (Buddhism)
eternity; permanence; unchanging
Tokoname ware
Etymology The prefix 常 (とこ ) is derived from the classical Japanese adjective 常し (とこし ) meaning 'eternal' or 'unchanging'. It is related to the more common word 常に (つねに , 'always').
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