Strengthen
/strˈɛŋθən/
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Definition
(verb) To make strong or stronger; to add strength to; to increase the strength of; to fortify.
Sentence Examples
It is important to strengthen the basis.
We need to reorganize it in order to strengthen our business activities.
CEFR Practice Quiz
The exercises are designed to ____ the muscles in your lower back and help improve your overall posture.