underside

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the lower side of anything (Freq. 1)
• Syn:
bottom, undersurface
• Derivationally related forms:
bottom (for: bottom)
• Hypernyms:
side, face
• Hyponyms:
base, bilge, heel, sole, underbelly

• Từ đồng nghĩa / Synonyms:
  bottom, undersurface