primarydifficulty
nounUK /ˈpraɪməri ˈdɪfɪkəlti/
US /ˈpraɪmɛri ˈdɪfɪkəlti/
The biggest problem that makes something hard to do.
The primary difficulty in learning to ride a bike is keeping your balance.
OTHER MEANINGS
2. The first or most important trouble that appears in a process.
The primary difficulty of the project showed up in the first week.
3. The main reason a task cannot be finished easily.
The primary difficulty was that we had no tools.
4. The hardest part of a lesson or subject.
For many students, the primary difficulty is the grammar.