trusting
UK: ˈtrʌstɪŋ | US: ˈtrʌstɪŋ
adj. showing a willingness to rely on others; inclined to trust
v. (present participle of trust) placing confidence in someone or something
The word trusting derives from the Old Norse traust (confidence, help), which entered Middle English as trust (noun/verb). The suffix -ing is a productive English morpheme forming present participles or adjectives. Combined, trusting literally means "having confidence" or "in the act of placing trust." The evolution reflects a straightforward compounding of Germanic roots with English grammatical suffixes.
She gave him a trusting smile, believing every word he said.
Trusting strangers can sometimes lead to disappointment.
His trusting nature made him vulnerable to scams.
The dog’s trusting eyes melted her heart.
Avoid trusting unreliable sources for critical decisions.