I am writing a poem and I need a word meaning "could not" that is only one syllable to be able to fit into the rhythm. I need it to be in past tense also.
I need it to replace "couldn't" in this line
That couldn’t be quenched with water.
And the whole stanza is
She set fiercest fires I’ve ever seen,
That couldn’t be quenched with water.
Her talons raked the earth so deep,
She crushed through bricks and mortar.
EDIT:
I can easily change the line to something else, but I won't do so unless there is no alternative to "Could not". So I would prefer if future answers would refrain from suggesting that I change the line or the words in it to replace "Could not".