加わる， くわわる
1. to be added to, to be appended
2. to join in (e.g. a group of friends), to participate
3. to increase (e.g. heat), to gain in (e.g. influence), to grow, to gather (speed)
4. to be applied (e.g. heat, pressure), to be exerted
添加上，附上；加入(例如：一个朋友团体)，参与；增加(例如温度)、获得(例如影响力)、增长、聚集