lack of appetite; anorexia
apathy; lassitude; lethargy; languor
betterment; improvement; kaizen (Japanese business philosophy of continuous improvement)
digestion (of food); digestion (of information); assimilation; consumption; absorption; (arch.) losing one's form and turning into something else
function; facility; faculty; feature
promotion; acceleration; encouragement; facilitation; spurring on
in an instant; in a moment; immediately; suddenly; all of a sudden; all at once
heart; mind; bottom of one's heart; core (of one's character); centre; center; heart (organ)
pursuit of knowledge; studying; learning; training; completing a course