12-Letter Words Starting OP & Ending S

• incomprehensibility resulting from obscurity of meaning

• the quality of being opaque to a degree; the degree to which something reduces the passage of light

• taking advantage of opportunities without regard for the consequences for others

• the visual property of something having a milky brightness and a play of colors from the surface

• the relation between opposed entities

• a person skilled in testing for defects of vision in order to prescribe corrective glasses

• a person who places expediency above principle

• taking immediate advantage, often unethically, of any circumstance of possible benefit