letter; missive; note; mail
gotcha; alrighty; got it; OK
(emotional) tension; anxiety; (highness of) spirits; (good) mood; tension; tensile strength
to stream; to flow (liquid, time, etc.); to be washed away; to be carried; to drift; to float (e.g. clouds); to sweep (e.g. rumour, fire)
lack of expression; blank look (on one's face)
such; like that; that sort of; very
cherry blossom viewing; flower viewing
feeling guilty; having a guilty conscience; having qualms about