Compare: 下 vs 下

下げ

lowness (of degree, value, etc.); inferiority

下した

below; down; under; younger (e.g. daughter)

N3Noun

lowness (of degree, value, etc.); inferiority

した下

N5CommonNoun

below; down; under; younger (e.g. daughter)

陽(ひ)は知らぬ間(あいだ)に地平線下(した)に沈んだ。

The sun sank below the horizon before I knew it.

投稿一覧の下(した)の凡例を見て原因が分かりました。

When I looked at the explanatory notes under the posts list I realized what was causing it.