self-government (n.)

word forming element indicating "oneself," also "automatic," from Old English use of self (pron.) in compounds, such as selfbana "suicide," selflice "self-love, pride, vanity, egotism," selfwill "free will." Middle English had self-witte "one's own knowledge and intelligence" (early 15c.).

OED counts 13 such compounds in Old English. Middle English Compendium lists four, counting the self-will group as a whole. It re-emerges as a living word-forming element mid-16c., "probably to a great extent by imitation or reminiscence of Greek compounds in (auto-)," and formed a great many words in the pamphlet disputes of the 17c.

late 14c., "act of governing or ruling;" 1550s, "system by which a thing is governed" (especially a state), from Old French governement "control, direction, administration" (Modern French gouvernement), from governer "to steer, be at the helm of; govern, rule, command, direct," from Latin gubernare "to direct, rule, guide, govern," originally "to steer, to pilot"(see govern). Meaning "governing power" in a given place is from 1702. Compare governance.