unashamedly - nestydatě
BrE
/ʌnə'ʃeɪmədlɪ/
AmE

adverb - without feeling ashamed

 
undoubted - nepochybný
BrE
/ʌn'daʊtɪd/
AmE
/ʌn'daʊt̬ɪd/

adjective - definite; not questioned

upgrade
upgrade - vylepšení, zdokonalení, vyšší verze (programu apod.)
BrE
/'ʌpgreɪd/
AmE
/'ʌpgreɪd/

noun - a change or a new feature that makes something better or of a higher standard

 
undesirable - nežádoucí, nežádaný, nechtěný
BrE
/ˌʌndɪ'zaɪərəbl/
AmE
/ˌʌndɪ'zaɪərəbl/

adjective - not wanted by people

 
unwise - nerozumný, nemoudrý, hloupý
BrE
/ʌn'waɪz/
AmE
/ʌn'waɪz/

adjective - foolish; not advisable, not sensible

 
underwater - pod vodou
BrE
/ˌʌndə'wɔ:tə/
AmE
/ˌʌndər'wɔ:t̬ər/

adverb - under the water surface

 
unpopular - nepopulární, neoblíbený
BrE
/ʌn'pɒpjʊlə/
AmE
/ʌn'pɑ:pjʊlər/

adjective - not liked by people

upset
upset - rozrušený, rozčilený, podrážděný
BrE
/ʌp'set/
AmE
/ʌp'set/

adjective - unhappy or worried

 
unique - unikátní, jedinečný
BrE
/jʊ'ni:k/
AmE
/jʊ'ni:k/

adjective - rare, special, not like anything else

 
UFO - UFO
BrE
/'ju:ˌef'əʊ/
AmE
/'ju:ˌef'oʊ/

noun - (abbreviation) Unidentified Flying Object

 
upstream - proti proudu
BrE
/ʌp'stri:m/
AmE
/ʌp'stri:m/

adverb - in the direction where a river or stream comes from

 
unit - oddíl (učebnice), lekce (část učebnice)
BrE
/'ju:nɪt/
AmE
/'ju:nɪt/

noun - one of the several parts of a textbook with a particular topic

 
unit - jednotka
BrE
/'ju:nɪt/
AmE
/'ju:nɪt/

noun - a single complete thing

unfaithful
unfaithful - nevěrný
BrE
/ʌn'feɪθfl/
AmE
/ʌn'feɪθfl/

adjective - having a sexual relationship behind your partner's back

 
unemotional - bezcitný, necitový, tvrdý (povahou)
BrE
/ˌʌnə'məʊʃənl/
AmE
/ˌʌnə'moʊʃənl/

adjective - not emotional