thesis
the·sis/ˈθisɪs/noun
thesis is spelled T-H-E-S-I-S: 6 letters and 2 syllables (the·sis). It appears 11 times per million words in written English, the 6,565th most frequent word form (wordfreq, 2021 data). As a noun, thesis means “A proposition or statement supported by arguments” (English Wiktionary, September 2026). The plural of thesis is theses.
How many letters and syllables are in thesis?
| Letters | 6: T-H-E-S-I-S |
|---|---|
| Syllables | 2: the·sis |
| In writing | 11 times per million words; the 6,565th most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is thesis?
Thesis appears 11 times per million words in written English, the 6,565th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce thesis?
- UK /ˈθiːsɪs/
- UK /ˈθɛsɪs/
- US /ˈθisɪs/
Thesis has 2 syllables, split the·sis in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-uk-thesis.oga, En-us-thesis.ogg, En-uk-theses.ogg, Wikimedia Commons (author and licence on each file's page).
What rhymes with thesis?
5 words on PlainSpell end in the same sounds as thesis from its last stressed vowel (/isɪs/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of thesis
- theses plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does thesis mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A proposition or statement supported by arguments.
- 2
A lengthy essay written to establish the validity of a thesis (sense 1.1), especially one submitted in order to complete the requirements for a non-doctoral degree in the US and a doctoral degree in the UK; a dissertation.
- 3
A conjecture, especially one too vague to be formally stated or verified but useful as a working convention.
- 4
An affirmation, or distinction from a supposition or hypothesis.
- 5
In the dialectical method of Georg Wilhelm Friedrich Hegel: the initial stage of reasoning where a formal statement of a point is developed; this is followed by antithesis and synthesis.
- 6
The action of lowering the hand or bringing down the foot when indicating a rhythm; hence, an accented part of a measure of music or verse indicated by this action; an ictus, a stress.
- 7
A depression of the voice when pronouncing a syllables of a word; hence, the unstressed part of the metrical foot of a verse upon which such a depression falls, or an unaccented musical note.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Thesis in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | thèse |
| German | These , Abschlussarbeit, Bachelorarbeit, Masterarbeit, Diplomarbeit, Doktorarbeit |
| Portuguese | tese |
| Spanish | tesis , tesis doctoral, tesina |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does thesis come from?
From Late Middle English thesis (“lowering of the voice”) and also borrowed directly from its etymon Latin thesis (“proposition, thesis; lowering of the voice”), from Ancient Greek θέσῐς (thésĭs, “arrangement, placement, setting; conclusion, position, thesis; lowering of the voice”), from τῐ́θημῐ (tĭ́thēmĭ, “to place, put, set; to put down in writing; to consider as, regard”) (ultimately from Proto-Indo-European *dʰeh₁- (“to do; to place, put”)) + -σῐς (-sĭs, suffix forming abstract nouns or nouns of action, process, or result). The English word is a doublet of deed.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).