English English Dictionary
- happen unexpectedly in English:
1. 
crop up
The issue has continued to crop up in the 2000s.
I used these skills to help me with problems which crop up evry day
English word "happen unexpectedly"(crop up) occurs in sets:
Phrasal verbs 1- I class II semesterphrasal verbs 1
Phrasal verbs 1
Phrasal verbs 2
other words beginning with "H"
handsome in Englishhang in English
happen in English
happy in English
harbour in English
hard in English
