arduous /ärˈdū-əs/

1. Steep, difficult to climb
2. Difficult to accomplish
3. Laborious

ardˈuously adverb

• psychometric
• psychometrical
• psychometrician
• psychometrics
• psychometries
• psychometrist
• psychometrists
• psychometry
• psychomotor
• psychoneuroimmunology
• psychoneuroses
• psychoneurosis
• psychoneurotic
• psychoneurotics
• psychonomic
• psychonomics
• psychopannychism
• psychopannychist
• psychopannychists
• psychopath
• psychopathic
• psychopathics
• psychopathies
• psychopathist
• psychopathists