Propitiatingly: an action done in a conciliatory or appeasing manner. When someone behaves propitiatingly, they are trying to win favor or avoid anger by making gestures of goodwill.
Quaver: a trembling or shaky sound in someone’s voice.
Truculently: behavior that is aggressively defiant or belligerent.
Inimical: harmful, hostile, or adverse. It describes something that is detrimental or unfriendly.
Crepitation: a crackling or popping sound, often produced by the movement of joints or bones.