'problem-solver' originates from the combination of 'problem' and 'solver', where 'problem' comes from the Greek word 'problēma', meaning 'a task or challenge', and 'solver' is derived from the Latin word 'solvere', meaning 'to loosen or untie'.

'problem' changed from the Greek word 'problēma' to the Latin 'problema', and eventually became the modern English word 'problem'. 'Solver' evolved from the Latin 'solvere' to the Old French 'solvir', and eventually became the modern English word 'solver'.

Initially, 'problem' meant 'a task or challenge', and 'solver' meant 'one who loosens or unties'. Over time, 'problem-solver' evolved to mean 'a person who finds solutions to difficult or complex issues'.