Customers began to complain that their Wi-Fi routers were ________ connectivity.
Lose is a verb. To lose is to suffer a loss, to be deprived of, to part with, or to fail to keep possession of.
Loose is an adjective used to describe things that are not tightly fitted.
For an easy trick to remember the difference, think of this phrase: A gambler who is loose with his money may lose money.