You see a T, so you say a T. That is the natural instinct, and it is exactly what makes listen sound foreign. Native speakers silence the T completely: /ˈlɪsən/, not /ˈlɪstən/.
The Rule: The T is silent when it sits between S and a final -EN or -LE: the patterns -STEN and -STLE. (Often and soften follow the same logic.)
Silent T words
Practice these words:
More: glisten, moisten, christen, nestle, thistle, bustle, hustle, gristle, hasten.
Why Does This Happen?
The cluster /stn/ or /stl/ is hard to say quickly, so English dropped the middle /t/ centuries ago to make the words flow. The spelling kept the T as a fossil of older pronunciation.
Exceptions
Not every ST is silent. When the T begins a stressed part or a clear syllable, you say it: stop, story, system, last, best, mister. The rule is specific to the -STEN and -STLE endings.
Quick Summary
| Pattern | T? | Examples |
|---|---|---|
| -STEN | silent | listen, fasten, often, glisten |
| -STLE | silent | castle, whistle, wrestle, thistle |
| ST- / -ST | pronounced | stop, last, system |
Want to train your ear and mouth on these patterns? Try our interactive pronunciation practice and hear each sound in context.