Atrophy
To waste away or fail to develop
Efficacy
The power to bring about the desired result; effectiveness
Emolument
Salary or fees for work done; compensation
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Incipient
Beggining to exist or appear; in the first stage
Inculcate
To impress upon or teach by frequent repetition
Inestimable
Too valuable or great to be measured
Lackluster
Lacking brightness or vitality; without spirit or enthusiasm
Martinet
A strict disciplinarian
Prodigious
Regimen
A regulated program, especially one designed to improve or maintain health
Stellar
Stoic
One seemingly indifferent to pleasure or pain
Vibrant
Zealous
Very enthusiastic; fervent; passionate on behalf of someone or something