a traffic light

one's heart, mind, true motives

boxing (the sport of boxing)

vacuum

heart failure

(Zen Buddhism) the teaching of intangible or abstract concepts in 仏法 (buppō, “dharma”) without using words / non-verbal communication, or the ability to immediately understand each other without words

(law) trial / (sports) referee, umpire / (tarot) Judgement

conviction, confidence in

epicenter(AmE), epicentre(BrE) - the point on the Earth's surface directly above the focus of an earthquake. / (figuratively) The focal point of any activity, especially if dangerous or destructive .

aggression / invasion / raid