先生は階段をかけ上がった。

teacher; master; doctor; with names of teachers, etc. as an honorific; previous existence

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

stairs; stairway; staircase

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to hang (e.g. picture); to hoist (e.g. sail); to raise (e.g. flag); to sit; to take (time, money); to expend (money, time, etc.); to make (a call); to multiply; to secure (e.g. lock); to put on (glasses, etc.); to cover; to burden someone; to apply (insurance); to turn on (an engine, etc.); to set (a dial, an alarm clock, etc.); to put an effect (spell, anaesthetic, etc.) on; to hold an emotion for (pity, hope, etc.); to bind; to pour (or sprinkle, spray, etc.) onto; to argue (in court); to deliberate (in a meeting); to present (e.g. idea to a conference, etc.); to increase further; to catch (in a trap, etc.); to set atop; to erect (a makeshift building); to hold (a play, festival, etc.); to wager; to bet; to risk; to stake; to gamble; to be partway doing ...; to begin (but not complete) ...; to be about to ...; indicates (verb) is being directed to (someone)

to rise; to go up; to come up; to ascend; to be raised; to enter (esp. from outdoors); to come in; to go in; to enter (a school); to advance to the next grade; to get out (of water); to come ashore; to increase; to improve; to make progress; to be promoted; to advance; to be made (of profit, etc.); to occur (esp. of a favourable result); to be adequate (to cover expenses, etc.); to be finished; to be done; to be over; (of rain) to stop; to lift; to stop (working properly); to cut out; to give out; to die; to win (in a card game, etc.); to be arrested; to turn up (of evidence, etc.); to be deep fried; to be spoken loudly; to get stage fright; to be offered (to the gods, etc.); to go; to visit; to eat; to drink; to be listed (as a candidate); to serve (in one's master's home); to go north; indicates completion