词根词缀：cad-, cas-, cid-

【来源及含义】Latin: to fall, befall

【相关词根词缀】 A cross reference of other word family units that are related directly, or indirectly, to: "chance, luck, fate": aleato-; auspic-; fortu-; -mancy; serendipity; sorc-; temer-; tycho-.

【同源单词】accidence, accident, accidental, accidentally, accidently, cadaver

词根词缀：mort-, mor-, mori-, morti-

【来源及含义】Latin: death, dead; die, dying

【相关词根词缀】 Related "death, dead; kill" units: -cide; lethal-; neci-; necro-; phono-; thanato-.

【同源单词】abmortal, admortal, alamort, algor mortis, amort, amortality

词根词缀：rigi-, rig-

【来源及含义】Latin: stiff, hard, numb; to be frozen, to grow stiff with cold, to be chilled

【同源单词】acid rigor, calcium rigor, catatonic rigidity, cerebellar rigidity, clasp-knife rigidity, cogwheel rigidity