attach

unir firmemente

to fasten or join in a way that is not likely to move

sujetar o unir una cosa a otra de forma segura

sujetar firmemente

to fasten or join in a way that is safe and not likely to give way

unir o fijar una cosa a otra

fijar sueltamente

to fasten or join in a way that is not firm or tight

sujetar o unir de una manera que no es firme ni apretada

unir a

connects the item being attached to the destination surface or object

conecta el elemento que se está uniendo a la superficie u objeto de destino