Use 'lose out' when someone doesn't win, especially in situations where there's direct competition.

Competition Loss

'Lose out' often implies missing a chance that might not come again.

Missed Opportunity

The phrase suggests personal disappointment from not having achieved or obtained something.

'Lose out' can relate to negative outcomes as a result of specific actions or decisions.

Suggests that inaction or hesitation might lead to a disadvantage.

Use 'lose out' to express a loss due to an event, often beyond one's control.