C1 English collocations

Collocations at CEFR level C1, each with a meaning, an example sentence and the mistake to avoid.

• all nightduring the whole of a night, from evening until morning
• boost productivityto increase the amount of work that people or machines produce
• empirical evidenceinformation based on observation or experiments rather than theory
• academic staffthe teachers and researchers employed by a university or college
• profound impacta very strong and deep effect on someone or something
• shed light onto help explain something or make it easier to understand
• flesh and blooda member of your family, or a normal human being with human weaknesses