Standard Lemma guide

semtex

noun · verb · 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: /ˈsɛm.tɛks/
  • CMU ARPABET: S EH1 M T EH0 K S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A highly malleable general-purpose plastic explosive.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

verb

Meaning 2

To use semtex to destroy (something).

Definition source: English Wiktionary via Wiktextract

Usage: colloquial, transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Genericized trademark Semtex, derived from the Czech name of the suburb of Pardubice where it was manufactured, Semtín, and ex(plosive).