This is the 1590th most frequent Chinese word.
怀疑
To doubt or suspect.
In this sentence, "怀疑" (huáiyí) means "to suspect" or "to doubt" someone's actions or intent.
我怀疑他今天不会来。
I suspect he will not come today.
Here, "怀疑" is used to express skepticism or doubt regarding the validity or accuracy of a theory or concept.
科学家怀疑这种理论的可靠性。
Scientists doubt the reliability of this theory.
In this instance, "怀疑" conveys a sense of personal uncertainty or questioning towards certain situations or facts.