opera; labor (labor): contentio (exertion): industria (unwearied exertion): conatus, -ūs (effort): studium (. zeal). (The words are found in this connection and order.) conatus studiumque; opera et studium. To take pains, operam dare or navare; niti, eniti (to strive, exert one’s self): laborare, elaborare (to labor upon anything). (The words are found in this connection and order.) eniti et efficere, eniti et contendere, contendere et laborare (all usually followed by ut); intendere (to attempt with exertion; followed by an infinitive): to take very great pains, omnibus viribus contendere; omnibus nervis conniti; omni ope atque opera eniti (all followed by ut, etc.): to take pains to no purpose, operam, operam et oleum, perdere; frustra niti: to take pains on anybody’s behalf, niti pro aliquo; alicui opeam praestare or dicare: to take pains about anything, anquirere aliquid (to look carefully for): sequi, persequi (to strive or endeavor after): studere, operam dare or navare alicui rei (to make an effort for the attainment of anything).