How

Definition:

(adv.) In what manner or way; by what means or process.
(adv.) To what degree or extent, number or amount; in what proportion; by what measure or quality.
(adv.) For what reason; from what cause.
(adv.) In what state, condition, or plight.
(adv.) By what name, designation, or title.
(adv.) At what price; how dear.

Compare how with other words:

how vs. insight

how vs. however

greeting vs. how

how vs. tumulus