TH to N Assimilation
When "in the" becomes "in-nuh"
What is it?
When "the" follows a word ending in /n/, the TH sound often assimilates (changes) to match the N, becoming another [n] sound.
in the
→
/ɪn ðə/
→
[ɪn nə]
This creates a smooth double-N sound: "in the" → "in-nuh".
When does it happen?
TH-to-N assimilation occurs when:
- Word ends in /n/ — in, on, an, been, when, then, etc.
- Followed by "the" — the most common word in English
- In fast/casual speech — very common in everyday conversation
**Note:** This makes speech flow more smoothly — the tongue doesn't have to move between N and TH positions.
Examples
| Phrase | Standard | Spoken |
|---|
| in the | ɪn ðə | ɪn nə |
| on the | ɑn ðə | ɑn nə |
| when the | wɛn ðə | wɛn nə |
Exceptions
- Careful/formal speech: TH may be pronounced distinctly
- Emphasis: "in THE box, not on it" — TH pronounced for contrast
- Slow speech: When speaking deliberately, sounds stay separate