fasten on/upon something phrasal verb ( see also ↑ fasten )
to give particular attention to something because you think it is important or interesting:
My mother fastened on the word ‘unsafe’.
fasten on/upon something phrasal verb ( see also ↑ fasten )
to give particular attention to something because you think it is important or interesting:
My mother fastened on the word ‘unsafe’.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012