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"plainly" is also used as a crossword clue. If that's what you saw, the answer is often noticeably (10 letters).
Definitions
in a simple manner; without extravagance or embellishment
Word origin
From Middle English playnly, pleinly, pleyneliche, equivalent to plain + -ly.
Used in a sentence
“She decorated the room plainly but neatly.”
“'Tell me plainly what you think of my daughter's little companion.'”
“You will see that ours is plainly the better method.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Without ornament”7 letters
02“In clear terms”7 letters
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