unidentifiable
— Adjective
– English
～ impossible to identify
unidentified flying object
— Noun
– English
～ an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
unidentified
— Adjective
– English
～ being or having an unknown or unnamed source; "a poem by an unknown author"; "corporations responsible to nameless owners"; "an unnamed donor"
unidentified
— Adjective
– English
～ not yet identified; "an unidentified species"; "an unidentified witness"
unidimensional
— Adjective
– English
～ relating to a single dimension or aspect; having no depth or scope; "a prose statement of fact is unidimensional, its value being measured wholly in terms of its truth"- Mary Sheehan; "a novel with one-dimensional characters"
unidirectional
— Adjective
– English
～ operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem"