Improvise

To compose or recite without preparation; to make something from whatever materials are available

Inanimate

Lifeless; sluggish

Incentive

Motivation; encouragement; motivating

Incorrigible

Incapable of being corrected or reformed; persistently bad

A person who will not be reformed

Indict

To charge with an offense or a crime; to make a formal accusation on the basis or legal evidence

Inquisitive

Full of questions; eager to learn; very curious

Insipid

Lacking flavor or taste; dull; uninteresting

Integrity

Wholeness; soundness; strength of character; honesty

Intensify

To increase; to strengthen; to strengthen; to make more intense

Invincible

Not to be overcome; unconquerable