certain

A common way to emphasize a high degree of certainty.

Used to express complete and total certainty, with no doubt.

Indicates a very high probability, just short of complete certainty.

A strong way to express certainty, often implying confidence.

Informal way to express a high but not complete level of certainty.

Means that something is so nearly certain that any difference is unimportant.

Indicates a moderate level of certainty; more than a guess but not absolute.

Indicates certainty based on good reasons or evidence, but still allowing for doubt.

Used to strongly state that something is not certain at all.

A common phrase to express that you lack definite knowledge about something.

A fixed phrase used when you are not completely sure and cannot give a definite answer.

Used to express a strong belief or conviction about something.

To take action to ensure that something will happen or is true.

To have an internal sense of conviction, based on intuition or feeling.

To give the impression of being sure or definite.

To appear to be sure or definite based on external signs.

To reach a state of being sure after a period of uncertainty.

To gradually become more sure about something over time.

Used to specify the subject or topic of one's certainty.

Similar to 'about', used to specify the subject of one's certainty.