A machine with moving parts that convert power into motion. (n)
engine
A person employed for wages or salary, especially at a non-executive level. (n)
employee
Causing one to feel self-conscious, awkward, or ashamed. (adj)
embarrassing
Achieving maximum productivity with minimum wasted effort or expense. (adj)
efficient
Extremely tired; completely drained of energy. (adj)
exhausted
A serious, unexpected, and dangerous situation requiring immediate action. (n)
emergency
Absolutely necessary; extremely important. (adj)
essential
Having formally agreed to marry someone; also actively involved with a project or activity. (adj)
engaged
To travel through an unfamiliar area to learn about it; to inquire into or discuss (a subject or issue) in detail. (v)
explore
An act of asking for information; a question. (n)
enquiry
To break free from confinement or control; to get away from a dangerous situation. (v)
escape
A public display of works of art or other items of interest. (n)
exhibition
To give support, confidence, or hope to someone. (v)
encourage
Being the same in quantity, size, degree, or value. (adj)
equal
Extremely large; huge. (adj)
enormous
Pain in the ear.(n)
earache