observes
v.v. to watch something carefully to learn more about it. It can also mean to follow a rule or custom.
v. to watch or monitor something attentively for scientific or analytical purposes; alternatively, to comply with a law, custom, or religious tradition.
The scientist observes the birds every morning.
The security team observes the crowd through several cameras to ensure everyone stays safe during the festival.
While the researcher observes the chemical reaction for any signs of instability, the rest of the staff observes a strict protocol regarding laboratory safety and data entry.
The verb is transitive and takes a direct object. When meaning 'to follow a rule', it is often used in formal or legal contexts.
he observe the ruleshe observes the rulesLearners often forget the third-person 's' ending for this verb in the present tense.