Etymology
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ablaze (adv.)
late 14c., "on fire," from a "on" (see a- (1)) + blaze (n.).
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able (adj.)

"having sufficient power or means," early 14c., from Old French (h)able "capable; fitting, suitable; agile, nimble" (14c.), from Latin habilem, habilis "easily handled, apt," verbal adjective from habere "to hold" (from PIE root *ghabh- "to give or receive").

"Easy to be held," hence "fit for a purpose." The silent h- was dropped in English and resisted academic attempts to restore it 16c.-17c. (see H), but some derivatives (such as habiliment, habilitate) acquired it via French. Able seaman, one able to do any sort of work required on a ship, may be the origin of this:

Able-whackets - A popular sea-game with cards, in which the loser is beaten over the palms of the hands with a handkerchief tightly twisted like a rope. Very popular with horny-fisted sailors. [Smyth, "Sailor's Word-Book," 1867]
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-able 

common termination and word-forming element of English adjectives (typically based on verbs) and generally adding a notion of "capable of; allowed; worthy of; requiring; to be ______ed," sometimes "full of, causing," from French -able and directly from Latin -abilis. It is properly -ble, from Latin -bilis (the vowel being generally from the stem ending of the verb being suffixed), and it represents PIE *-tro-, a suffix used to form nouns of instrument, cognate with the second syllables of English rudder and saddle (n.).

A living element in English, used in new formations from either Latin or native words (readable, bearable) and also with nouns (objectionable, peaceable). Sometimes with an active signification (suitable, capable), sometimes of neutral signification (durable, conformable). It has become very elastic in meaning, as in a reliable witness, a playable foul ball, perishable goods. A 17c. writer has cadaverable "mortal."

To take a single example in detail, no-one but a competent philologist can tell whether reasonable comes from the verb or the noun reason, nor whether its original sense was that can be reasoned out, or that can reason, or that can be reasoned with, or that has reason, or that listens to reason, or that is consistent with reason; the ordinary man knows only that it can now mean any of these, & justifiably bases on these & similar facts a generous view of the termination's capabilities; credible meaning for him worthy of credence, why should not reliable & dependable mean worthy of reliance & dependence? [Fowler]

In Latin, -abilis and -ibilis depended on the inflectional vowel of the verb. Hence the variant form -ible in Old French, Spanish, English. In English, -able tends to be used with native (and other non-Latin) words, -ible with words of obvious Latin origin (but there are exceptions). The Latin suffix is not etymologically connected with able, but it long has been popularly associated with it, and this probably has contributed to its vigor as a living suffix.

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able-bodied (adj.)
"healthy and sufficiently strong," 1620s; see able + body.
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ablegation (n.)
Origin and meaning of ablegation

"act of sending abroad or away," 1610s, from Latin ablegationem (nominative ablegatio) "a sending off or away," noun of action from past-participle stem of ablegare "send away on a commission," from ab "off, away from" (see ab-) + legare "send with a commission, send as an ambassador" (see legate).

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ableism (n.)
by 1990 in feminist and lesbian literature, from able (adj.) + -ism. Defined in 1991 as "bias against the physically challenged and differently abled (formerly the disabled or handicapped) by the temporarily abled. The phrase 'blind to the truth' would be an example of ableist language." [U.S. News & World Report, vol. 110] Related: Ableist.
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abloom (adj.)

"in blossom, in a blooming state," 1855, from a- (1) + bloom (v.).

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ablution (n.)
Origin and meaning of ablution

"ritual washing," late 14c., from Latin ablutionem (nominative ablutio) "a washing, cleansing," noun of action from past-participle stem of abluere "to wash off, wash away, cleanse by washing," from ab "off, away from" (see ab-) + luere "to wash," from PIE root *leue- "to wash."

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ABM (n.)
1963, initialism (acronym) for anti-ballistic missile.
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