hesitate

To be reluctant, wait to act, or pause

hygiene

A condition or practice conductive the health

illustration

Something that represents or explains a concept

imaginary

Existing only in imagination, not real

immediately

without lapse if time; without delay; instantle

inconvenient

Not easily accessible or at hand

Jealous

Resentment against a person because of that person's success

juvenile

Characteristics of or pertaining to a younger person

jewerly

Articles of gold, silver, precious stones

Judgment 

Ability to judge, make a decision, or form an opinion

Laboratory

A building, or other place equipped to conduct exeriments

Language

Communication by voice in the distinctively human manner