Wiktionary
strengthed
vb. (en-past of: strength)
Usage examples of "strengthed".
But even as his grip strengthed, a great well of blackness opened up in his mind as his pain threatened to swell up and swallow him.
Out of that closeness came your own triumvirate, which has strengthed Jean-Claude's powers immensely.
I used heavy orange nylon fishing-line for the string, wound round a specially made drum for the winch, which I had strengthed and fitted with a chest-brace.
Smells of blood and aftershave and cigarette smoke pressed around him, strengthed by confinement in the lineup box.