“mind”

The capability for rational thought.

Physical fitness leads to mental acuity.

One should put one's mental faculties to good use.

It is not important; do not fret; used to reassure or comfort the person to whom it is said.

To ponder, to go over in one's mind.

A representation created in the mind without the use of one's faculties of vision, sound, smell, touch, or taste; an instance of thinking.

Not large or big; insignificant; few in number.

To recall from one's memory; to have an image in one's memory.

An abstract archetype of a given thing, compared to which real-life examples are seen as imperfect approximations; pure essence, as opposed to actual examples.

Me, as direct or indirect object the speaker as the object of a verb or preposition, when the speaker is also the subject.

A set of structured activities; a plan of action.

To review materials already learned in order to make sure one does not forget them, usually in preparation for an examination.

The action or process of using one's mind to consider or reason about something.

Ability to influence; strength or energy of body or mind; active power; vigour; might; capacity of exercising an influence or producing an effect.

The practice or characteristic of carefully gathering information; a state or mindset of attentiveness.

A check or review to make sure something is consistent, reasonable, etc.

To remove something and put it in a different place.