a. 不受限制的, 自由自在的, 不受妨碍的

[ adj ]
not confined or limited
<adj.all>
the gift of a fresh eye and an untrammeled curiositythe untrammeled rush that the snows had shown in the first spring sun

Untrammeled \Un*tram"meled\, a.
Not hampered or impeded; free. [Written also {untrammelled}.]