malpractice /mal-prakˈtis or malˈ/

1. An evil or improper practice
2. Professional misconduct
3. Treatment falling short of reasonable skill or care
4. The illegal attempt of a person in a position of trust to benefit at the expense of others

malpractitioner /-tishˈən-ər/ noun

• pianisms
• pianissimo
• pianissimos
• pianississimo
• pianist
• pianiste
• pianistic
• pianistically
• pianists
• piano
• piano accordion
• piano accordions
• pianoforte
• pianofortes
• Pianola®
• pianolist
• pianolists
• piano nobile
• piano organ
• piano organs
• piano-player
• piano-players
• piano roll
• piano rolls
• pianos