to fight bravely; (fig.) to struggle; to work hard

to do everything one can; to spare no effort; to strive

to rise vigorously; a spirited start

to exert oneself (bound form)

dauntless; to summon up courage and determination; using extreme force of will

to rouse to vigorous action; energetic mood

to roll up one's sleeves for action

to advance bravely; to endeavor

to spread wings and fly

Space Shuttle Endeavor

to dash on bravely with no thought of personal safety (idiom); undaunted by dangers; regardless of perils

to work energetically for prosperity (of the country)

a show of strength

to write at a tremendous speed

to catch up vigorously; to set off in hot pursuit