by heart, from memory, by rote

empty; vain; sky

spring (season)

lowest of its kind, the worst

the lower portion, end / lowness in degree or rank / the downstream portion of a river / the downriver area / the area farther from the capital / the last part of a month, year, etc.

the lower portion, base / under the influence of

down; below; beneath

under a situation

lower; below; beneath / down; descending; going down

below / under / down / lower / beneath