一粒子既約[ichiryuushikiyaku] one particle irreducible (physics)
皆既[kaiki] total eclipse
皆既蝕[kaikishoku] total eclipse (of sun by moon)
皆既日食[kaikinisshoku] total solar eclipse
既に[sudeni] already

既の事[sundenokoto] almost
既の所で[sundenotokorode] almost
既往症[kioushou] medical history
既婚[kikon] marriage
既婚者[kikonsha] married person

伊達男[dateotoko] dandy
一男[ichinan] boy
下女下男[gejogenan] servants
下男[genan] manservant
寡男[yamoo] widower

間男[maotoko] married woman's secret lover
既婚男性[kikondansei] married man
貴男[anata] you (referring to someone of equal or lower status)
男気[otokogi] chivalrous spirit
好男子[koudanshi] handsome man