Carelessly, inattentively, neglectfully. Obsolete.

In a light manner (in various senses of light, adj.1); lightly. colloquial in later use.

carelessly, heedlessly.

(a) With indifference or unconcern; carelessly, thoughtlessly, indifferently. (b) Depreciatively, slightingly.

Recklessly. Now rare (chiefly nonstandard in later use).

Without much care or attention; carelessly; lightly.

Without taking care; recklessly.

In an incurious manner; carelessly; without care, concern, or close attention.

In a careless manner, without care; without apprehension (obsolete); without attention, art, or study; (now esp.) heedlessly, thoughtlessly…

Carelessly.

With, or as with, a slap and a dash; in a hasty, sudden, or precipitate manner; esp. without much consideration, thought, ceremony, or care…

With haughty carelessness, disdainfully.

Negligently. Obsolete. rare.