cavity; hollow; void; hollow (voice, smile, etc.); blank (eyes, look, etc.); vacant (expression, stare, etc.)
absentmindedness; dreaminess; fool; blockhead; hollowness; emptiness
utsuro-bune; hollow ship; unidentified craft said to have washed ashore in Ibaraki Prefecture in 1803, sometimes alleged to have been a UFO
fool; blockhead; idiot; dunce
this fleeting world; this transient life; one's current body; one's mortal shell; (arch.) cast-off cicada shell; (arch.) cast-off husk
to become empty (hollow); to relax from a tense situation into a vacant or absent minded state