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Wiktionary
commit suicide

vb. To kill oneself; to take one's own life.

WordNet
commit suicide

v. kill oneself; "the terminally ill patient committed suicide"

Usage examples of "commit suicide".

A few hours ago I would have said, no, he will not commit suicide.

And I am at a loss to understand how the Stoic philosophers can presume to say that these are no ills, though at the same time they allow the wise man to commit suicide and pass out of this life if they become so grievous that he cannot or ought not to endure them.

At the threat of any torture or extortion, you are warned that I shall commit suicide instantly in ways unknown to you.

In fact yes, she did buy the pills - but her father had declared to all the family that he intended to commit suicide.

It made it the next best thing to flatly impossible, and any transition within the resonance (assuming someone could have plotted one in the first place) would have been no more than a complicated way to commit suicide.

The Coroner was bound to ask - in a voice of sympathetic apology - if the young man had ever given reason to fear he might commit suicide.