Etymology
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self (pron., n., adj.)

Old English self, sylf (West Saxon),  seolf (Anglian), "one's own person, -self; own, personal; same, identical," from Proto-Germanic *selbaz (source also of Old Norse sjalfr, Old Frisian self, Dutch zelf, Old High German selb, German selb, selbst, Gothic silba), Proto-Germanic *selbaz "self," from PIE *sel-bho-, suffixed form of root *s(w)e-, pronoun of the third person and reflexive (referring back to the subject of a sentence), also used in forms denoting the speaker's social group, "(we our-)selves" (see idiom).

Its use as the second element in compounded reflexive pronouns (herself, etc.) was in Old English, from the original independent (and inflected) use of self following personal pronouns, as in ic selfa "myself," min selfes "of myself." With a merging of accusative, dative, and genitive cases.

As a noun from c. 1200 as "the person or thing previously specified;" early 14c. as "a person in relation to that same person." G.M. Hopkins used selve as a verb, "become or cause to become a unique self" (1880) but its use seems to have been restricted to poets.

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self-begotten (adj.)

"generated without aid of another," 1670s (Milton); see self- + begotten.

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self-awareness (n.)

"condition of being aware of oneself," 1876, from self- + awareness.

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self-educated (adj.)

"educated by one's own efforts alone, without regular training," 1761, from self- + educated.

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self-improvement (n.)

"improvement of one's character, etc., by one's own efforts," 1745, from self- + improvement.

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self-censorship (n.)

"censorship of oneself," by 1950; see self- + censorship

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self-perfection (n.)
"perfection of one's character or life," 1810, from self- + perfection.
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self-taught (adj.)

"self-taught; educated by one's own efforts alone, without regular training," 1725; see self- + taught.

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self-perception (n.)

"faculty of the immediate introspection of the soul by itself," 1670s, from self- + perception.

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