suspicious
The German word 'verdächtig' is used to describe something or someone that is suspicious, arousing or deserving suspicion. It can be used in various contexts, such as 'Das verdächtige Paket wurde von der Polizei untersucht.' (The suspicious package was examined by the police.) or 'Sein verdächtiges Verhalten machte mich nervös.' (His suspicious behavior made me nervous.)
Your behavior is suspicious.
This sentence is typically used when the speaker suspects the listener's behavior and implies that the listener may be involved in something unintentional or dishonest. The adjective 'verdächtig' describes the noun 'Verhalten' and indicates suspicion.
The package looks suspicious.
Used when there is something unclear or doubtful about the package, thereby making it suspicious. Here, 'verdächtig' is an adjective that describes the noun 'Paket', demonstrating the package's suspicious appearance.
He appeared very suspicious to me.
It implies that the speaker perceives the person in question (in this case, 'He') as suspicious, often due to his actions, behaviors, or general demeanor. 'Verdächtig' is used here as an adjective to describe 'Er'.