Enter criteria and click Find Words
Only three words put U first and F third, and all of them open UNF.
N takes the second box in three of the three, which is every word on the page. English reaches this pattern only through the UN prefix followed by an F, and very few stems accept that.
UNFIT is the one you would produce without thinking. UNFED and UNFIX are both real and both reachable at a push, but neither is common.
The three differ in the fourth and fifth boxes only. I takes the fourth box in two of them and E takes the other, so a single confirmed letter there halves the page.
Each ends on a different letter, which means the last box settles it outright every time.
There is no branch to narrow here and no distribution worth reading. Nothing repeats a letter either, so a visible double rules the pattern out completely.
Check which of the three fits the boxes you already have and play it.
Not always, but it is the only one of the three in common use. Play it first unless a confirmed letter rules it out.
Yes, it means to detach or loosen. It is the only word here ending in X, so guessing that letter settles the page.
An F in the third box after a U needs the UN prefix, and almost no short stem starts with F and fits five letters. Three words is all that survives.