fundamental, radical, basic / drastic, thorough

staking everything, playing for all-or-nothing

be crowded / be complicated / go into, go in / put into / become some state completely / do thoroughly / remain in the same state, such as remain sitting or remain silent

air conditioner

communication: the conveying of information between two or more entities

excessive self-consciousness

itemized form, itemization, bullet point

looter at the scene of a fire (abbr. 火(か)事(じ)泥(どろ) (kajidoro)) / (figuratively) someone who takes advantage of confusion for dishonest personal gain

(marketing) consumer (as opposed to professional; i.e. everyman)

hypochondria