Wording: content, contend, suffice

Hi! I'm trying to write a poem, and I would like to express the following meaning in four syllables:

"I would not be content" [to let it go]

Now, in the back of my mind, the following two sentences seem correct to me in a sort-of archaic way:

"I'd not contend" [to let it go]

"I'd not suffice" [to let it go]

I am fully aware that contend means something else entirely:

1. to assert e.g. he contended that the sky was blue

2. to struggle with e.g. he contended with his fear of snakes

However, I can't shake the feeling that contend can be used in such a way, maybe in times long gone. I did some searching and found two examples of what appears to be this usage:

1. the example given in Merriam-Webster for use of content as a transitive verb is as follows: … he had been betrayed into a position which neither contended his heart nor satisfied his conscience. — Edward Bulwer-Lytton

https://www.merriam-webster.com/dictionary/content

2. one of the characters in this play uses the phrase: I'll not contend, in a manner that might imply I'd not be content. The link to the page is below.

[https://books.google.com/books?id=aCZEAAAAcAAJ&pg=PA434&lpg=PA434&dq=i%27ll+not+contend&source=bl&ots=JROXs3Yc0p&sig=i6MDizJ_g0sMw5lw03tDPWBmgOg&hl=en&sa=X&ved=0ahUKEwiwip3nu8DUAhVI2GMKHcCoATMQ6AEITzAH#v=onepage&q=i'll%20not%20contend&f=false]]

As for the other phrase using suffice, it feels right to me, and I cannot explain it; it feels like I've heard it before in a medieval context.

Does anyone have any opinion or reference as to whether these phrases are legitimate? Any help is appreciated.