habituated

This is doubtless due, as in the case of most poisons, to the system becoming habituated to its use.

Poor wretches, habituated to poverty, undergo all these sufferings with a fortitude which we frequently meet with in malefactors.

"It's only a lobster, you know," she said, with the careless ease of a young woman quite habituated to midnight suppers.

Besides these philosophers, thousands of wise men amongst the Greeks, ancient and modern, habituated themselves to travel.

I gradually became habituated to the custom, and did not notice it.