(of the sound of someone jumping into a body of water) with a kerplunk / (of the sound of someone jumping into a body of water) with a splashing sound / (of the sound of someone jumping into a body of water) with a crashing sound

long-distance call / trunk call

be attached to / stick to / adhere

litmus paper

rigor mortis <Latin> / cadaveric stiffening

postmortem rigidity / cadaveric rigidity / rigor mortis

law of nature

four truths / four truths enlightened by Buddha

apparent solar time

arrangements / preparations