A person or organization that provides aid or support, whether financial, material, technical, or emotional.
災害発生時には多くの援助者が被災地に駆けつけた。
When the disaster occurred, many aid workers rushed to the affected area.
ボランティアの援助者が高齢者の買い物を手伝っている。
Volunteer helpers are assisting elderly people with shopping.
治療には専門的な援助者の協力が必要だ。
The treatment requires the cooperation of professional caregivers/supporters.