Basic Guidelines For English Spellings
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See US English definition of fasten
See UK English definition of fasten
See Spanish definition of sujetar
1‘he fastened the door behind him’
unfasten, unlock
2‘they fastened splints to his leg’
unfasten, remove
3‘the belt was fastened with an enormous silver buckle’
unfasten, open
4‘he fastened his horse to a sapling on the bank of the river’
unfasten, untie
5‘the dress fastens at the front with ten small buttons’
unfasten, undo
6‘his gaze fastened on me’
7‘blame had been fastened on some unknown nutter’
8‘the critics fastened upon two sections of the report’