In a simple way or state; considered in or by itself; without addition; alone.
(ant)
Plainly; without art or subtlety
(syn)
Foolishly; stupidly.
(quote-book)|title=Celestina|publisher=Broadview|year_published=2004|page=179
Merely; solely.
(ux)
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absolutely, positively.
(quote-song)
Frankly.
(alternative form of)