Standard Lemma guide

underside

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /ˈʌndəˌsaɪd/
  • US: /ˈʌndɚˌsaɪd/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: AH1 N D ER0 S AY2 D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The side that is below or underneath, the bottom.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the lower side of anything

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: bottom, undersurface

Antonyms: none provided

Broader terms: side, face

Narrower terms: base, bilge, heel, sole, underbelly

History

Etymology

Etymology tree Proto-Indo-European *h1én Proto-Indo-European *h1entér Proto-Indo-European *(H)n̥dhí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dhér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- Proto-Indo-European *seh1-der. Proto-Germanic *sīdaz Proto-Germanic *sīdǭ Old English sīde Middle English side English side English underside From under- + side.

Across languages

Translations

13 source translations are retained for this English entry.

  • Bulgarian: долна страна (dolna strana) — side that is underneath
  • Chickasaw: nota' — side that is underneath
  • Danish: underside — side that is underneath
  • Esperanto: fundo — side that is underneath
  • Finnish: alapuoli — side that is underneath
  • German: Unterseite — side that is underneath
  • Ingrian: alapooli — side that is underneath
  • Khalaj: alt — side that is underneath
  • Khalaj: asra — side that is underneath
  • Khalaj: ast — side that is underneath
  • Norwegian Bokmål: underside — side that is underneath
  • Norwegian Nynorsk: underside — side that is underneath
  • Swedish: undersida — side that is underneath
Real reading context

underside in complete knowledge articles