dissertation

C2+ Topic:Describing Qualities

US /ˌdɪsərˈteɪʃən/ UK /ˌdɪsəˈteɪʃən/ See IPA manual

noun

Meanings

1

noun
a long formal treatise, especially one written for a doctoral degree

She defended her dissertation on medieval trade routes in June.

Thesaurus

Synonyms

1 noun · a long formal treatise,... thesis treatise disquisition discourse essay monograph

Word family

Derived forms dissertationaldissertationist

Related forms dissertateassertion

Etymology

From Latin dissertatio ('discourse, treatise'), from dissertare ('to debate, discuss'), frequentative of disserere ('to examine, discuss'), from dis- ('apart') + serere ('to join, arrange in order').

dissertatio Latin serere Latin

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Topics

Describing Qualities Word Formation & Derivatives Register & Style

# dissertation

**Type:** Word
**Level:** C2+
**Part of speech:** noun
**IPA (US):** ˌdɪsərˈteɪʃən
**IPA (UK):** ˌdɪsəˈteɪʃən

## Meanings
1. a long formal treatise, especially one written for a doctoral degree

## Examples
- She defended her dissertation on medieval trade routes in June.

## Synonyms
- thesis
- treatise
- disquisition
- discourse
- essay
- monograph

## Derived Forms
- dissertational
- dissertationist

## Related Forms
- dissertate
- assertion

## Roots and Affixes
- Root: dissertatio
- Root: serere

## Etymology
From Latin dissertatio ('discourse, treatise'), from dissertare ('to debate, discuss'), frequentative of disserere ('to examine, discuss'), from dis- ('apart') + serere ('to join, arrange in order').

## AI Etymology
Dissertation is from Latin dissertatio ('discourse, treatise'), from dissertare ('to debate, discuss'), frequentative of disserere ('to examine, discuss'), from dis- ('apart') + serere ('to join, arrange in order'). The ancestry passes through Latin dissertatio and Latin serere. The prefix dis- often marks separation, reversal, or negation in Latin and English formations, helping to explain the word's surface structure. In present use as a noun, it means "a long formal treatise, especially one written for a doctoral degree", keeping the historical formation close to the word's ordinary semantic work. Related words include dissertate and assertion; derived forms include dissertational and dissertationist.

## Topics
- Describing Qualities
- Word Formation & Derivatives
- Register & Style

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