fatten up
"fatten-up" is a 8-letter English headword indexed on PlainSpell.
The verdict
“fatten up” is uncommon English (outside the top frequency list), classed as a verb. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To cause to gain weight by means of feeding.
Corpus desk
Index EN-fatten-up · fatten up · English
fatten up · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "F" 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.
| Property | Value |
|---|---|
| Headword | fatten up |
| Language | English |
| Part of speech | Verb |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “fatten up” in English
Rare enough to double-check
fatten up is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 3 senses are on record.
Our edit-distance generator produced no likely misspellings for fatten up, suggesting the orthography follows predictable English patterns. Our dataset records no confusable match here, which typically means the spelling is too distinctive to be mistaken for another word.
No borrowing history is documented for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is fatten up, spelled F-A-T-T-E-N- -U-P.
Definition
- 1To cause to gain weight by means of feeding.
- 2To become fat or fatter by gaining weight.
- 3To make bigger; to expand.
Recorded use
Wiktionary examplesThese source excerpts show how fatten up appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
My cat looks underweight, so I'll fatten him up with higher-calorie cat food.
I visited my mother for a month, and she managed to fatten me up 20 pounds.
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.