Fixed expressions
Idioms
English fixed expressions — phrases whose meaning isn't obvious from the individual words. Each entry shows the meaning, an example sentence, and its register.
Idioms containing brain, including its inflections. Clear word filter
3 idioms
brain power
CEFR B1intelligence or mental ability used to think and solve problems
Informal
not rocket science
CEFR B1not difficult to understand or do
Informal
Matching variant: not brain surgery
rack your brains
CEFR B2To think very hard in an effort to remember or solve something.
Informal