construction
(n.) the act or result of putting different things together
specific
(adj.) relating to one thing and not others
interlock
(v.) to fit together firmly
role-play
(v.) to pretend to be someone else, especially part of learning a new skill
relieve
(v.) to make an unpleasant feeling less strong
precaution
(n.) an action that is done to prevent something unpleasant or dangerous happening
hazard
(n.) something that is dangerous and likely to cause damage
advise
(v.) to give someone advice
environment
(n.) all of the living things and nonliving things in a place
water
(n.) a clear liquid that is necessary for life
air
(n.) the mixture of gases that surrounds the ear and that we breathe
need
(v.) to have to have something or to want something very much
