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To be certain - synonyms or related words

clear

adjective

to feel confident and determined about a belief or decision

know

verb

to feel certain about something

believe in

to feel confident that a person or organization is good or reliable

know your own mind

to be certain about what you like and what you want

swear to

to be completely certain of something

depend on

if you can depend on someone to do something, you are sure that they will do it

feel/know something in your bones

to feel certain about something, although you cannot explain or prove it

bet the farm

to be certain that something will happen or bring you success, especially when this makes you spend all your money on it

bit rot

when electronic information is lost because the software or devices needed to read it are no longer available

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troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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