(computer science) steepest descent method

sudden / immediate, rapid

suddenly / abruptly

urgent / sudden / hasty / rapid / fast / quick / abrupt / hurry

a paper aeroplane

the first sight of something / something seen for the first time

one should start a big project with immediate, practical steps; start small / the person who proposes something should be the first one to take practical steps to implement it

(Onmyodo) An incantation used to ward off evil spirits.

sharp rise; sudden rise / (of aircraft) ascent at a steep angle

to rise sharply; to rise suddenly / (of aircraft) to ascend at a steep angle