Pronunciation: /ˈfæsən əˈpɒn/
verb to attach or secure something firmly to something else
A1 I fastened upon my seatbelt before the car started moving.
A2 The detective fastened upon the key piece of evidence in the case.
B1 The teacher fastened upon the importance of studying for the upcoming exam.
B2 The company fastened upon a new marketing strategy to increase sales.
C1 The politician fastened upon the controversial topic to gain attention from voters.
C2 The artist fastened upon a unique style that set them apart from other contemporary painters.
preposition to focus on or give attention to something
A1 She fastened upon the idea of going to the beach for the weekend.
A2 The children fastened upon the opportunity to play in the park.
B1 The detective fastened upon the suspect's alibi as a key piece of evidence.
B2 The CEO fastened upon the new market strategy as the best way to increase profits.
C1 The scientist fastened upon the groundbreaking research findings to revolutionize the field.
C2 The artist fastened upon the inspiration for their next masterpiece.
formal The detective was able to fasten upon the key piece of evidence in the case.
informal I quickly fastened upon the best route to avoid traffic.
slang She fastened upon the opportunity to score front row tickets to the concert.
figurative His words seemed to fasten upon her heart, leaving a lasting impact.
fastened upon
fasten upon
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has fastened upon
is fastening upon
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to fasten upon
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fastening upon