Below are the words that matched your query...
Unobservant
- not consciously observing; "looked through him with blank unseeing eyes"
Unseeing
- not consciously observing; "looked through him with blank unseeing eyes"
- lacking sight; "blind as an eyeless beggar"
Unperceivable
- impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch"
Undetectable
- barely able to be perceived; "the transition was almost indiscernible"; "an almost insensible change"
- not easily seen
Unobservable
- not accessible to direct observation
Unflawed
- without a flaw; "a flawless gemstone"
Undefiled
- (of language) not having its purity or excellence debased; "uncorrupted English"; "learn to speak pure English undefiled"- Van Wyck Brooks
- free from stain or blemish
Unending
- continuing forever or indefinitely;
Unmentionable
- unsuitable or forbidden as a topic of conversation; "unmentionable words"
- a garment worn under other garments
Unpermissive
- not inclined to grant permission; severe in discipline