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un·fet·ter verb 1 : to free from fetters

2 : to loose from restraint : LIBERATE

Synonyms

discharge, emancipate, enfranchise, free, liberate, loose, loosen, manumit, release, spring, unbind, unchain—more at FREE

un·fil·ial adjective : not observing the obligations of a child to a parent : UNDUTIFUL

un·fin·ished adjective 1 : not brought to an end

2 : being in a rough or unpolished state

1unfit adjective 1 : not fit or suitable

2 : physically or mentally unsound

Synonyms

incapable, incompetent, inept, inexpert, unqualified, unskilled, unskillful—more at INCOMPETENT

graceless, improper, inapt, incongruous, incorrect, indecorous, inept, infelicitous, unbecoming, unhappy, unseemly, unsuitable, wrong

2unfit verb : to make unfit : DISQUALIFY

un·fit·ness noun : the quality or state of being unfit

un·fix verb 1 : to loosen from a fastening : DETACH

2 : UNSETTLE

un·flag·ging adjective : not flagging : continuing with vigor

Synonyms

indefatigable, inexhaustible, tireless, untiring—more at TIRELESS

un·flap·pa·ble adjective : not easily upset or panicked

— un·flap·pa·bly adverb

Synonyms

imperturbable, nerveless, unshakable; also calm, collected, composed, cool, nonchalant, placid, self-possessed, serene, tranquil, undisturbed, unperturbed, unruffled, unshaken, untroubled, unworried

Antonyms

shakable

un·fledged adjective 1 : not feathered or ready for flight

2 : not fully developed : IMMATURE

un·flinch·ing adjective : not flinching or shrinking

— un·flinch·ing·ly adverb

Synonyms

determined, dogged, grim, implacable, relentless, unrelenting, unyielding—more at UNYIELDING

un·fold verb 1 a : to open the folds of : open up

2 : to lay open to view : DISCLOSE

3 : to produce or yield flowers : BLOSSOM

4 : to open the folds of : spread or straighten out

Synonyms

[3] bloom, blossom, blow, burgeon, flower—more at BLOOM

[4] expand, extend, fan, flare, open, spread, stretch

un·forced adjective : not forced : not compelled

un·fore·seen adjective : not foreseen : unexpected

Synonyms

unanticipated, unexpected—more at UNEXPECTED

un·for·get·ta·ble adjective : incapable of being forgotten

— un·for·get·ta·bly adverb

un·for·giv·able adjective : incapable of being forgiven

Synonyms

indefensible, inexcusable, unjustifiable, unpardonable, unwarrantable—more at INEXCUSABLE

un·formed adjective 1 : not regularly formed or ordered : UNDEVELOPED

2 : not formed

Synonyms

amorphous, formless, shapeless, unshaped, unstructured—more at FORMLESS

un·for·tu·nate adjective 1 : not fortunate : UNLUCKY

2 : attended with misfortune

3 : UNSUITABLE

4 : admitting of or deserving regret : fit to be deplored

— unfortunate noun

Synonyms

[1] hapless, ill-fated, ill-starred, luckless, unhappy, unlucky—more at UNLUCKY

[2] calamitous, catastrophic, destructive, disastrous, fatal, fateful, ruinous—more at FATAL

[4] deplorable, distressful, grievous, heartbreaking, lamentable, regrettable, woeful—more at REGRETTABLE

un·for·tu·nate·ly adverb 1 : in an unfortunate manner

2 : it is unfortunate

un·found·ed adjective : lacking a sound basis : GROUNDLESS

Synonyms

baseless, groundless, invalid, unreasonable, unsubstantiated, unsupported, unwarranted—more at BASELESS

un·freeze verb -froze ; -fro·zen ; -freez·ing 1 : to cause to thaw

2 : to remove from a freeze <~ prices>

un·fre·quent·ed adjective : seldom visited or traveled over

un·friend·ly adjective 1 : not friendly or kind

2 : set or placed in opposition

— un·friend·li·ness noun

Synonyms

[1] chill, chilly, cold, cold-blooded, cool, frigid, frosty, glacial, icy, unsympathetic, wintry—more at COLD

[2] adverse, counter, disadvantageous, hostile, inimical, negative, prejudicial, unfavorable, unsympathetic—more at ADVERSE

un·frock verb : DEFROCK

un·fruit·ful adjective 1 : not producing fruit or offspring : BARREN

2 : yielding no valuable result : UNPROFITABLE

— un·fruit·ful·ness noun

un·fun·ny adjective : not funny : failing to achieve