Please help me find the correct word?
what verb would you use to describe the action of someone who uses all his strength and tries his best to pass through a quagmire?

thank you very much!

Slogging should fit the bill

It could be

endeavor- to try very hard

or

toil, drudge, labor, plod, pine away, exert, grind

or even attempt or strive

It's hard to find the word. My guess is that you have a specific word in your mind that you are looking for. So, you may end up being the one to figure it out!

By the way, I love the fact that you used the word "quagmire" in your question. It is a very appropriate, yet underused, word. Awesome!

Persist. Persevere. Push onward/forward.
Slog. Trudge.
Traverse, Trevail. Trek.

to strive


verb
To exert one's mental or physical powers, usually under difficulty and to the point of exhaustion: drive, fag, labor, moil, strain 1, sweat, toil, travail, tug, work. Idiom: break one's back (or neck). See work

trudge

noun
1. a long difficult walk

verb
1. walk heavily and firmly, as when weary, or through mud; "Mules plodded in a circle around a grindstone"