Discomfit means to frustrate the plans or expectation of; to thwart; to make uneasy; to confuse; to disconcert: “She will discomfit her boyfriend when her secret marriage is made known.”
Discomfort means Lack of comfort; uneasiness; inconvenience: “The poor live in discomfort.”
Disconcert is to upset or to frustrate plans, etc. or to upset the composure or self-possession of; to embarrass; to confuse: “Little blips can disconcert performers on stage.”
It will disconcert me if the perceived level of discomfort with our cabins serves to discomfit our plans for a long voyage.