plain ‧ ly /ˈpleɪnli/ BrE AmE adverb
1 . in a way that is easy to understand or recognize:
Mrs Gorman was plainly delighted.
The first part of that argument is plainly true.
We could hear Tom’s voice plainly over the noise of the crowd.
[sentence adverb]
Plainly the laws are not effective.
2 . speaking honestly, and without trying to hide the truth:
She told him plainly that she had no intention of marrying him.
3 . simply or without decoration:
a plainly dressed young girl
The room was very plainly furnished.