unchanging
adjective C2- remaining constantly unchanged
From the library
Dantès reflected, as he worked, on the shout of joy which, with a single word, he could evoke from all these men, if he gave utterance to the one unchanging thought that pervaded his heart; but, far from disclosing this precious secret, he almost feared that he had already said too much, and by his restlessness and continual questions, his minute observations and evident preoccupation, aroused suspicions.
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