The Collaborative International Dictionary of English v.0.48:

Undisguised \Undisguised\
   See disguised.

WordNet (r) 3.0 (2006):

undisguised
    adj 1: plain to see; "undisguised curiosity"

Moby Thesaurus II by Grady Ward, 1.0:

135 Moby Thesaurus words for "undisguised":
   apparent, authentic, beholdable, bona fide, candid, card-carrying,
   clear, detectable, dinkum, discernible, disclosed, evident,
   explicit, exposed, exposed to view, following the letter, genuine,
   good, guileless, hanging out, heartfelt, honest, honest-to-God,
   in evidence, in full view, in plain sight, in view, inartificial,
   insight, lawful, legitimate, lifelike, literal, manifest, naked,
   natural, naturalistic, noticeable, observable, obvious, open,
   open to view, openhearted, original, out-and-out, outcropping,
   overt, patent, perceivable, perceptible, plain, pure, real,
   realistic, recognizable, revealed, rightful, seeable, showing,
   simon-pure, simple, sincere, sterling, straightforward,
   sure-enough, to be seen, transparent, true to life, true to nature,
   true to reality, unadulterated, unaffected, unalloyed, unassumed,
   unassuming, unbeguileful, unbeguiling, uncalculating,
   uncamouflaged, unclouded, uncolored, unconcealed, unconcocted,
   uncopied, uncounterfeited, uncurtained, undarkened, undeceitful,
   undeceiving, undeceptive, undesigning, undisguising, undissembled,
   undissembling, undissimulated, undissimulating, undistorted,
   unexaggerated, unfabricated, unfanciful, unfeigned, unfeigning,
   unfictitious, unflattering, unhidden, unimagined, unimitated,
   uninvented, unmistakable, unmitigated, unobscure, unobscured,
   unpretended, unpretending, unqualified, unreserved, unrestrained,
   unromantic, unscreened, unshaded, unsimulated, unspecious,
   unsynthetic, untrimmed, unvarnished, veilless, verbal, verbatim,
   veridical, verisimilar, viewable, visible, visual, witnessable,
   word-for-word