I'dvsillWhat's the difference?

Quick tell: I'd is a contraction, ill is an adjective, so they fill different roles in a sentence.

Which to use

“I'd” is a contraction and “ill” is an adjective - they look or sound alike but fill different roles in a sentence.

#33,016
“I'd” frequency rank
#44,899
“ill” frequency rank
77915
confusion score

Side-by-Side Comparison

Feature I'd ill
Definition contração de I would (esse caso é o mais utilizado) doente

Where the spellings diverge

Shared letters are muted; the letters that actually set I'd and ill apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

3 ch
I'd
3 ch
ill

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: I'd is acontraction and illanadjective. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 77915, derived from the frequency rank of both members and their visual similarity.

I'd is recorded at frequency rank #33,016, classified as acontraction. ill is at rank #44,899, tagged as anadj, pronounced /ɪl/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 77915, this pair ranks #1,771 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of I'd vs ill

Shared letters: i. Private to "I'd": d. Private to "ill": l.

"I'd" · 2 letters · shape VC  ·  "ill" · 3 letters · shape VCC

Frequency comparison

I'd#33,016
ill#44,899

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "I'd" and "ill" be used interchangeably?
No - they are not even the same part of speech. "I'd" is a contraction and "ill" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "I'd" or "ill"?
"I'd" is the more common of the two: it sits at frequency rank #33,016 in our Portuguese list, against #44,899 for "ill". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering I'd vs ill

The fastest way to pick the right one every time.

  • Check the role first: if you need a contraction, it's “I'd”; for an adjective, it's “ill”.
  • See each word in full, definition, IPA, etymology and its other confusables. Full “I'd” entry
  • Browse more pairs most likely to be confused. Most confusable

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list