Solution

ANNEXING

4 clues

Adding on

Word class: Verb
Nature of clue: Use case
Difficulty: Medium

Appending

Word class: Verb
Nature of clue: Use case
Difficulty: Medium

Attaching

Word class: Verb
Nature of clue: Use case
Difficulty: Medium

Other solutions to Attaching

Incorporating

Word class: Verb
Nature of clue: Use case
Difficulty: Medium

Words are categorized by artificial intelligence: there can be mistakes.