subtleeffect
nounUK /ˈsʌtəl ɪˈfekt/
US /ˈsʌtəl ɪˈfekt/
A small change that is hard to notice at first.
The subtleeffect of the new paint made the room feel warmer.
OTHER MEANINGS
2. A tiny result that only shows up after a long time.
The subtleeffect of daily reading showed in her grades.
3. A gentle change you feel but cannot easily see.
There was a subtleeffect in the air after the rain.
4. A small detail that changes how something looks or feels.
The subtleeffect of the soft music calmed everyone down.