添加 tiānjiā to add
to add; to increase
How to remember 添加: 添 to add + 加 to add = to add.
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How it is used
- To add/put in extra - 添加剂 (tiānjiājì) additive, 添加内容 (tiānjiā nèiróng) add content, 添加好友 (tiānjiā hǎoyǒu) add a friend (on an app).
- About adding something more into an existing thing; common with ingredients, features, and app contacts.
- Contrast 增加 (zēngjiā, increase in amount); 添加 is inserting/appending an extra item.