Obsolete
来自Big Physics
late 16th century: from Latin obsoletus ‘grown old, worn out’, past participle of obsolescere ‘fall into disuse’.
wiktionary
From Latin obsolētus(“worn out, gone out of use”), past participle of obsolēscere(“to wear out, fall into disuse, grow old, decay”); see obsolesce.
From Latin obsolētō(“degrade, soil, sully, stain, defile”)
etymonline
obsolete (adj.)
"that is no longer practiced or used, out of date, gone out of use, of a discarded type," 1570s, from Latin obsoletus "grown old, worn-out," past participle of obsolescere "fall into disuse, be forgotten about, become tarnished," which probably is from ob "away" (see ob-) + an expanded form of solere "to be used to, be accustomed" (see insolent).
