This is the 4691st most frequent Chinese word.
疑心
"Doubt" or "suspicion."
Here, '疑心' is used to describe the act of doubting someone's intentions or truthfulness.
他因长久的隐瞒而疑心自己的朋友。
He doubts his friend due to prolonged concealment.
'疑心' illustrates the concept of suspicion as a characteristic or state, contrasting it with the natural candidness of children.
孩子们没有复杂的疑心,他们总是很坦率。
Children don't have complicated suspicions; they are always very candid.
In this sentence, '疑心' expresses a feeling of doubt or suspicion toward someone.