psi
Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.
Letters
3 characters
Language
English
word origin
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Detailed reference entry for the English word "psi", 3-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "psi" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "psi" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.
psi is aEnglishnoun. It means: The twenty-third letter of Classical and Modern Greek and the twenty-fifth letter of Old and Ancient Greek. Pronounced /psaɪ/. Often confused with pt and PU.
| Property | Value |
|---|---|
| Headword | psi |
| Language | English |
| Part of speech | Noun |
| IPA | /psaɪ/ |
| Letters | 3 |
| Frequency rank | #16,099 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Frequency rank visualization
Spelling & Dictionary Insight
The English entry for psi is 3 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /psaɪ/. Corpus data places it at rank #16,099 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
No frequent misspelling variants are recorded for psi in our index, suggesting the orthography either follows predictable English patterns or the word is uncommon enough that typo corpora lack signal.It also participates in 20 confusable-pair relationships, "pt", "PU", "PV", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From Middle English psi, from Latin psī, from Ancient Greek ψεῖ (pseî), the name for the twenty-third letter of the alphabet (Ψ, ψ). Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is psi, spelled P-S-I, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.
Definition
- 1The twenty-third letter of Classical and Modern Greek and the twenty-fifth letter of Old and Ancient Greek.
- 2A form of psychic energy.
Etymology
From Middle English psi, from Latin psī, from Ancient Greek ψεῖ (pseî), the name for the twenty-third letter of the alphabet (Ψ, ψ).
This word in other languages
Frequency rank: #16,099 in English
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Nearby English words
Other entries that begin with the letter P in our English index: