I hope these nails will suffice to hold the frame together.
The word suffice means to do, or be sufficient. One example of this word in a sentence would be "You will suffice in the position I am looking to fill, so suffice to say you are hired".
suffice
I am not that thirsty, one glass of water will suffice.
"A few dollars will suffice, I only need some change."
The food in my refrigerator will suffice until I can get to the grocery store next week.
The sentence "we hope that it would suffice to all your requirements" contains a subject-verb agreement error. The pronoun "it" does not agree in number with the plural noun "requirements." To correct this, the sentence should be revised to say "we hope that it would suffice for all your requirements" or "we hope that they would suffice to meet all your requirements."
Logic tells me it is not correct since "suffice" is a synonym of sufficient. You would never say "sufficient it to say" would you. So why say "suffice it to say"?
"Would an answer as simple as this suffice?"
(This is an archaic form, also it suffices to say, used mainly for creative effect.)"No more gold was found in the mine. Suffice it to say, I was left penniless."(see related link)
You never knew when to trust her; she hid behind artifice even when the truth would suffice.
A nice bowl of soup will suffice for my midday meal. The bandits are supposed to meet at their den tomorrow at midday.
Suffice it to say that Suffice is the verb form of Sufficient.