The Collaborative International Dictionary of English v.0.48:

Unembarrassed \Un`em*bar"rassed\, a.
   Not embarrassed. Specifically:
   [1913 Webster]
   (a) Not perplexed in mind; not confused; as, the speaker
       appeared unembarrassed.
       [1913 Webster]
   (b) Free from pecuniary difficulties or encumbrances; as, he
       and his property are unembarrassed.
       [1913 Webster]
   (c) Free from perplexing connection; as, the question comes
       into court unembarrassed with irrelevant matter.
       [1913 Webster]

WordNet (r) 3.0 (2006):

unembarrassed
    adj 1: not embarrassed; "a tinseled charm and unabashed
           sentimentality"- Jerome Stone; "an unembarrassed greeting
           as if nothing untoward had happened" [syn: unabashed,
           unembarrassed]

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "unembarrassed":
   bold, brazen, brazenfaced, clear, disembarrassed, exhibitionistic,
   flagrant, forward, immodest, notorious, shameless, unabashed,
   unashamed, unblushing, unburdened, unclogged, unencumbered,
   unhampered, unhandicapped, unhindered, unimpeded, unladen,
   unmodest, unobstructed, unprevented, untrammeled