To keep in check, manage, or control something.

maintenance of constant difference in frequency between two or more connected circuits or components. To use marks to follow a wild animal.

engaging in speech. action of talking. To say things or ideas to someone with words.

To use your ears to hear and understand things.

Concerning a person's private life or feelings. advertisement in personal column of newspaper.

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

To protect and care for someone or something.

Used to add new (often different) information.

Being uninteresting and taking a long time; boring.

devotion of time and attention to gaining knowledge of academic subject. Pieces of research. To focus on learning something usually at school.

For a reason.

unable to see or be seen clearly. To make something unclear or out of focus.

every person.

talk on religious or moral subject. Moral talk given as part of a church service.

sentence worded or expressed so as to elicit information. Issues or problems you are dealing with. ask someone questions.