attend to

(verb) get down to; pay attention to; take seriously. Synonyms: attend to, take to heart. Example: "Attend to your duties, please."

(verb) work for or be a servant to. Synonyms: serve, attend to, wait on, attend, assist. Examples: "May i serve you?." "She attends the old lady in the wheelchair." "Can you wait on our table, please?." "Is a salesperson assisting you?." "The minister served the king for many years."