いわiwauいわiwau
1.

To express joy or happiness in response to a positive event through words or actions, often during special occasions like New Year's or weddings.

2.

To offer blessings or well-wishes for someone's future success or happiness, often accompanied by gifts or rituals.

3.

To engage in celebratory activities, such as drinking or feasting, that mark a significant moment or achievement.

Example:

今年タイ航空は50周年記念を祝います。