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Another Word for Determine: 19 Synonyms with Examples

To determine is to find something out exactly, to decide it, or to be the main factor in it. Choose an alternative that matches which of these you mean.

As a verb: find out exactly

As a verb: decide

As a verb: be the deciding factor

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How they differ

Synonyms share a meaning, not always a tone. Here is when to pick each of the main options.

establish
Finds out and proves a fact.
ascertain
Very formal; finds out for certain. “Find out” usually reads better.
work out
Informal; calculates or solves.
settle
Decides something finally, ending debate.
dictate
Controls or decides something completely.
influence
Weaker: affects a result without fully deciding it.

Example sentences

  • establish: Tests established the age of the timber.
  • ascertain: The insurer needs to ascertain the cause of the damage.
  • work out: We worked out the cheapest route on a map.
  • settle: The date of the wedding is not settled yet.
  • dictate: The weather will dictate whether the match goes ahead.
  • influence: Reviews strongly influence which films people see.

Opposite of determine

  • guess
  • waver

More from WordNet

Less common or more specialised words WordNet lists for other senses of “determine”. Check the meaning before you use one.

verb: find, mold, regulate, specify, define, limit

WordNet 3.1, Princeton University. Used under the WordNet licence.

Frequently asked questions

What is another word for “determine”?
The most useful alternatives are “establish”, “ascertain”, “discover”, “find out”, “work out”. For the main sense (find out exactly), “establish” is usually the closest swap.
What is the difference between “establish” and “ascertain”?
establish: Finds out and proves a fact. ascertain: Very formal; finds out for certain. “Find out” usually reads better.
What is the opposite of “determine”?
Common antonyms are “guess”, “waver”.