straightly
In a straight manner; so as to be straight or aligned; without curve or bend.
A farmer in Hampshire was sorely distressed by the unsettling of his barn. However straightly over-night he laid his sheaves on the threshing-floor for the application of the morning's flail, when morning came, all was topsy-turvy, higgledy-piggledy, though the door remained locked, and there was no sign whatever of irregular entry.
Without deviation; directly.
[…] I was directing my course towards it, as straightly and as speedily as the windings of a very indifferent road would permit, […]
Immediately; straightaway.
[W]hẽ the vnclene ſpritꝭ ſawe him⸝ they fell doune before him⸝ and cryed ſayinge: thou arte the ſonne of God: And he ſtreyghtly charged thẽ that they ſhulde not vtter him.
Where it comes from
From Middle English streightly, streightli, streiȝtli, equivalent to straight + -ly.
Adapted from the Wiktionary entry straightly (CC BY-SA 4.0).