This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of trust.

adj. Having or exercising trust; confiding; unsuspecting; trustful.

Trustful; confiding.

adj. inclined to believe or confide readily; full of trust

"You begin by what you call trusting a friend, that is, aiding him to self-destruction -- buying him arsenic to clear his complexion -- you end by dragging all near you into your own abyss, as a drowning man would clutch at his own brother."

unsuspicious    confiding    unsuspecting   

confiding    unsuspecting    trustful   

trust   

adjusting    busting    disgusting    dusting    encrusting