of course - samozřejmě, zajisté, jistě

adverb - certainly

 

ore - ruda

noun - a mineral from which a metal can be extracted (such as iron etc.)

oar - veslo

noun - a wooden pole with a flat end that you use to row a boat

 

odd - lichý (číslo)

adjective - a number that you cannot easily divide by two, e.g. 1, 3, 5 etc, opposite of 'even'

 

odd - podivný, divný, zvláštní

adjective - strange, unusual

 

off - vypnuto

adverb - (of a machine etc.) not on

 

occasion - příležitost (událost)

noun - a special time when something happens

 

opportunity - příležitost

noun - a chance to do something

 

office block - administrativní budova

noun - a building in which there are offices

 

origin - původ

noun - the place or time where something has come from

office worker - úředník

noun - a person who works at an office

 

overtime - přesčas

noun - the work that you do after your regular working hours

 

organize - organizovat, uspořádat, pořádat, zorganizovat

verb - to plan and arrange something, usually an event etc.

opener - otvírák

noun - a tool for opening bottles and/or tins etc.

oblong - pravoúhlý, obdélníkový, obdélný

adjective - having right angles, similar to a square, but with two sides shorter, and two longer