infrasonic

adj

"infrasonic" is a 10-letter English headword indexed on PlainSpell.

The verdict

“infrasonic” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
10
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Having frequencies below the human audible range

Corpus desk

Index EN-infrasonic · infrasonic · English

infrasonic · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "I" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for infrasonic
PropertyValue
Headwordinfrasonic
LanguageEnglish
Part of speechAdjective
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “infrasonic” in English

infrasonicfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

infrasonic is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

No misspelling variants are generated for infrasonic in our index, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From infra- + sonic. The correct English form is infrasonic, spelled I-N-F-R-A-S-O-N-I-C.

Definition

  1. 1
    Having frequencies below the human audible range
  2. 2
    Generating or employing such sound waves

Etymology

From infra- + sonic.

Antonyms

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "infrasonic"?
"infrasonic" is spelled I-N-F-R-A-S-O-N-I-C.
What does "infrasonic" mean?
As an adjective, "infrasonic" means: Having frequencies below the human audible range
What is the origin of the word "infrasonic"?
From infra- + sonic. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list