accustomed
adj.adj. to be used to something so that it feels normal or natural to you. If you are in this state, you no longer find a situation strange or difficult.
adj. familiar with something through use or experience; inured to a particular condition. Often follows a linking verb and precedes a prepositional phrase.
I am accustomed to waking up early for work.
After living in the city for a decade, she became accustomed to the constant background noise of traffic.
The diplomat was well accustomed to the subtle nuances of international protocol, allowing him to navigate the tense negotiations with apparent ease and composure.
From accustom + -ed.
Typically follows the verb 'to be' or 'to become' and is followed by the preposition 'to'.
I am accustomed to wake up earlyI am accustomed to waking up earlyThe word 'to' here is a preposition, not part of an infinitive, so it must be followed by a gerund (-ing form).