1. (breaking) with a snap (of a thread, string, etc.) (Onomatopoeia)

2. (ending) suddenly (of a call, communications, etc.) (Onomatopoeia)

3. piercing (e.g. with a needle) (Onomatopoeia)

4. squashing (something small; e.g. an insect) (Onomatopoeia)

5. breaking out (e.g. of a pimple) (Onomatopoeia)