In Milton I have noticed the following participles used in this sense: unmoved, abhorred, unnumbered, unapproached, dismayed, unreproved, unremoved, unsucceeded, preferred. But as Milton was addicted to Latinising, I will give some examples from Shakspeare himself:
"Now thou art come unto a feast of death
A terrible and unavoided danger."—1 Hen. VI., Act IV. Sc. 5.
"We see the very wreck that we must suffer,
And unavoided the danger now,
For suffering so the causes of our wreck."—Rich. II., Act II. Sc. 1.
"All unavoided is the doom of destiny."—Rich. III., Act IV. Sc. 4.
"Inestimable stones, unvalued jewels."—Ib., Act I. Sc. 4.
"Tell them that when my mother went with child
Of that insatiate Edward."—Ib., Act III. Sc. 5.