pin ‧ prick /ˈpɪnˌprɪk/ BrE AmE noun [countable]
1 . a very small area or ↑ dot of something
pinprick of
a pinprick of light
2 . a very small hole in something, similar to one made by a pin
3 . something that slightly annoys you:
These problems were pinpricks compared with what was to come.