doubtfully.

= uncertainly, adv., in various senses.

in a doubting or uncertain manner; hesitatingly.

Uncertainly; insecurely.

In a faltering manner, hesitatingly.

Without clear or definite knowledge or statement; doubtfully, undecidedly.

In a dubitative or doubting manner; doubtingly.

Proverbial and allusive uses. with a grain of salt: (to accept a statement) with a certain amount of reserve. Also in similar phrases, now esp. with…

in doubt.

In a hesitant manner; hesitatingly.

In a doubtful, uncertain, or ambiguous manner; hesitatingly, ambiguously, indistinctly.

In a Pyrrhonic manner; sceptically, doubtfully. Cf. Pyrrhonism, n.

quasi-adv. In an uncertain manner.