Dismayful

And much dismay'd with that dismayful Sight, That back she would have turn'd for great Affright

Source: wiktionary

O let despair Haunt unbless'd souls; let its dismayful looks Affright not thee, thou source of clearest hope, Which in one stream thro' earthly dullness flows Into this glad receptacle, the heart.

Source: wiktionary

Add to this that—thought of all most dismayful!—he had himself to convince first, the worst dragon of all to kill, for bare honesty's sake, in his own field; while, all the time he was arming and fighting — like the waves of the flowing tide in a sou'-wester, Sunday came in upon Sunday, roaring on his flat, defenceless shore,

Source: wiktionary

I, myself, have observed—and I dare say it is within the experience of many here present to affirm the like—a man of that large experience which pertains to years of practice, boldly invade the uterine cavity with the sound, twisting it hither and yon with a force and careless abandon to its possible consequences, that not only utterly amazed me at the time, but which, on reflection afterwards, brought a shudder of horror and a dismayful foreboding as to the resultant mischief which had already been produced, or which it were likely to cause.

Source: wiktionary