upset - rozrušený, rozčilený, podrážděný

adjective - unhappy or worried

 

unique - unikátní, jedinečný

adjective - rare, special, not like anything else

 

UFO - UFO

noun - (abbreviation) Unidentified Flying Object

 

upstream - proti proudu

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

 

unit - oddíl (učebnice), lekce (část učebnice)

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

 

unit - jednotka

noun - a single complete thing

unfaithful - nevěrný

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

 

unemotional - bezcitný, necitový, tvrdý (povahou)

adjective - not emotional

unwrap - rozbalit

verb - to remove the paper that covers something (e.g. a present)

undercooked - nedovařený

adjective - not cooked long enough

underline - podtrhnout, podtrhávat

verb - to mark a word or a piece of text by drawing a line under it

 

up-to-date - moderní, současný, aktuální

adjective - belonging to the time, not old or old-fashioned

 

undercook - nedovařit

verb - not to cook food long enough

unreliable - nespolehlivý

adjective - not reliable

 

understanding - pochopení

noun - the ability to understand