形容詞 under-:

1. located below or beneath something else
   同義詞：nether, under
2. lower in rank, power, or authority
   同義詞：under

副詞 under-:

1. down to defeat, death, or ruin
   同義詞：under
2. through a range downward
   同義詞：under
3. into unconsciousness
   同義詞：under
4. in or into a state of subordination or subjugation
   同義詞：under
5. below some quantity or limit
   同義詞：under
6. below the horizon
   同義詞：under
7. down below
   同義詞：under
8. further down
   同義詞：under, below