attenuate, v. 1. thin, thin out, stretch out, spin out, extend, draw out, wiredraw; rarefy, etherealize, spiritualize, volatilize, vaporize, aerify; refine, subtilize, sublime.
2. weaken, reduce, lessen, decrease, diminish, lower; impair, invalidate, undermine, sap, undercut, enervate; dilute, adulterate, water down, Inf. cut.
-adj. 3. attenuated, thin, thread-like, sheer, transparent; fine-spun, cobwebby, delicate, air-spun, airy, gossamer, gossamery; flimsy, insubstantial, ethereal; drawn-out, extended.
4. weak, enfeebled, frail, infirm.
5. slender, slim, emaciated, gaunt; slight, lean, lank, scraggy, scrawny.
attenuation, n. 1. thinning out, rarefaction, ethe-realization, spiritualization, volatilization, vaporization; weakening, impairment, invalidation; diminution, lessening, dilution, adulteration.
2. thinness, tenuity, fineness, slenderness, leanness; flimsiness, delicateness, lightness, etherealness, airiness; refinement, subtlety, rareness.
attest, v. 1. Usu.
attest to testify, witness, bear witness, evidence, offer evidence, depone, swear to, state under oath, allege, plead; depose, certify, certificate, present an affidavit.
2. Usu.
attest to guarantee, guaranty, insure, ensure, warrant, endorse, vouch for, stand behind or by, back up; promise, pledge, plight, give one's solemn word or promise; assure, offer assurance, asseverate, avouch, aver, affirm.
3. document, circumstantiate, manifest, show, exhibit, display, demonstrate; prove, confirm, bear out, verify, validate, establish, authenticate; corroborate, substantiate, sustain, uphold, vindicate.
attestation, n. 1. testifying, witnessing, evidencing, declaration, testification, Law. exemplification; documentation, circumstantiation, demonstration, corroboration, substantiation; certification, confirmation, verification, validation, establishment, authentication; endorsement, vouching, recommendation; assurance, asseveration, averment, avouchment, affirmation.
2. testimony, evidence, information, witness, sworn statement, statement, document, Law. affidavit, Law. deposition; certificate, warrant, Law. acknowledgment; guarantee, guaranty, warranty, testimonial, Obs. vouch; promise, pledge, plight, oath, word.
attic1, n. garret, monsard, dormer; loft, cockloft, crow's nest, Archit. clerestory.
attic2, adj. 1. classical, classic, ancient, antique, early; traditional, standard, typical.
2. elegant, cultured, polished, refined, dignified, tasteful, in good taste; pure, chaste, simple, delicate, subdued, nice; subtle, witty, clever, intelligent, incisive, penetrating.
attire, v. 1. dress, clothe, garb, vest, apparel, habit, SI. dude up, SI. swank up; adorn, array, deck, deck out, bedeck, bedizen, dress up, trap, trap out, caparison; outfit, fit out, fit up, fit, rig, rig up, rig out, gear, turn out, accouter; All Inf. doll up, pretty up, gussy up, spruce up; All SI. dude up, swank up, trick out or up, fig out.
-n. 2. apparel, wearing apparel, wear, clothes, clothing; dress, garb, costume, guise, style; garments, vestments, raiment, habit, habiliments, Inf. gear, Jnf toggery, Inf. togs, Inf. duds, Sl. threads, SI. rags, (of transvestites) SI. drag; investment, vesture, investiture; array, wardrobe, accouterment; livery, uniform, regalia.