往下 is an adverb meaning 'downward' or 'downwardly', indicating movement or direction from a higher to a lower position in space, rank, degree, or time. The character 往 means 'toward' or 'in the direction of', and 下 means 'down' or 'below'; together, they form a directional compound emphasizing the downward trajectory. It is commonly used with verbs like 走 (walk), 看 (look), 滑 (slide), or 流 (flow) to specify direction.

This word appears frequently in physical descriptions (e.g., water flowing downward), instructions ('look downward'), data trends ('prices going downward'), and metaphorical contexts ('morale sinking'). Unlike the standalone word 下, which can function as a noun, verb, or complement, 往下 is strictly adverbial and usually precedes the main verb. It often co-occurs with directional complements or prepositional phrases but does not take objects itself.