occur

To happen or take place, especially without being planned.

• The power outage occurred right in the middle of our conference call.

• Serious accidents rarely occur when proper safety procedures are followed.

To come to someone's mind or enter one's thoughts.

• It never occurred to me that she might want to come along.

• Did it ever occur to you to ask for a receipt?

To exist or be found in a particular place, environment, or state.

• These minerals occur naturally in the desert rocks.

• Such behavior occurs across many different social species.