noncommittal
She replied by grunting noncommittally.
She smiled back noncommittally.
"He's doing something for me," Matt replied non-committally.

SMART Vocabulary: related words and phrases

Doubt & ambivalence
ambivalence
ambivalent
ambivalently
askance
be in two mindsidiom
fence-sitting
have a foot in both campsidiom
haw
hem
hem and hawidiom
nonconcern
nonplussed
quandary
rudderless
shades of greyidiom
warily
wary
waver
wavering
waveringly

Examples of noncommittally

noncommittally
He wagged a hand noncommittally.
From Huffington Post
The sergeant listened noncommittally, stopping him frequently to get repetitions.
From Project Gutenberg
One instance each of "airhole", "air-hole," "motorcycle," "motor-cycle," "noncommittally," and "non-committally," was retained.
From Project Gutenberg
He shook his head noncommittally, for he had not grasped the drift of the argument.
From Project Gutenberg
I smiled noncommittally, but did not answer him.
From Project Gutenberg
The expectant crowd looked noncommittally at the tall smokestacks, at the snags.
From Project Gutenberg
She stood behind, regarding him noncommittally.
From Project Gutenberg
Lone looked at him noncommittally.
From Project Gutenberg
He smiled noncommittally and shook his head.
From Project Gutenberg
She shook her head noncommittally.
From Project Gutenberg
She looked at him noncommittally.
From Project Gutenberg
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.