Etymology
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Words related to culpable

gulf (n.)

late 14c., "profound depth," from Old French golf "a gulf, whirlpool," from Italian golfo "a gulf, a bay," from Late Latin colfos, from Greek kolpos "bay, gulf of the sea," earlier "trough between waves, fold of a loose garment," originally "bosom," the common notion being "curved shape." This is from PIE *kuolp- "arch, curve, vault" (compare Old English hwealf"vault," a-hwielfan "to overwhelm," Old Norse holfinn "vaulted," Old High German welban "to vault").

Latin sinus underwent the same development, being used first for "bosom," later for "gulf" (and in Medieval Latin, "hollow curve or cavity in the body"). The geographic sense "large tract of water extending into the land" (larger than a bay, smaller than a sea, but the distinction is not exact and not always observed) is in English from c. 1400, replacing Old English sæ-earm. Figurative sense of "a wide interval" is from 1550s. The U.S. Gulf States so called from 1836. The Gulf Stream (1775) takes its name from the Gulf of Mexico.

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culprit (n.)

1670s, "person arraigned for a crime or offense," according to legal tradition from Anglo-French cul prit, a contraction of Culpable: prest (d'averrer nostre bille) "guilty, ready (to prove our case)," words used by prosecutor in opening a trial. See culpable. It seems the abbreviation cul. prit was mistaken in English for an address to the defendant.

Meaning "a criminal, an offender" (1769) is, according to OED, "A change of sense, apparently due to popular etymology, the word being referred directly to L. culpa fault, offense."

inculpable (adj.)
late 15c., from Late Latin inculpabilis "unblamable," from in- "not, opposite of" (see in- (1)) + culpabilis (see culpable).
mea culpa (interj.)

Latin expression meaning "I am to blame, through my own fault," a phrase from the prayer of confession in the Latin liturgy. For culpa, see culpable.