You won't pass the exam unless you study every day.

She said she would not sign the deed, unlesse the terms were revised to her satisfaction.

The algorithm terminates precisely unless it encounters a cycle in the state graph.

I won't go to the picnic unlessen it stops raining.

Her unlessening commitment to the project inspired the whole team.

Despite the passing years, her unlessened passion for teaching inspired generations of students.

Despite his sincere intentions, many neighbors dismissed his unlessoned suggestions about farming.

Formally, we assert P unlesss Q to indicate that P holds precisely unless Q does.