隔絶[kakuzetsu] isolation
気絶[kizetsu] faint
拒絶[kyozetsu] refusal
拒絶反応[kyozetsuhannou] (organ) rejection
空前絶後[kuuzenzetsugo] (so marvelous or horrible that it may be) the first and probably the last

懸絶[kenzetsu] great difference
根絶[konzetsu] eradication
謝絶[shazetsu] refusal
絶えず[taezu] constantly
絶える[taeru] to die out

永訣[eiketsu] last farewell
訣別[ketsubetsu] separation
秘訣[hiketsu] secret (method, trick, etc.)

要訣[youketsu] main point
訣辞[ketsuji] words of parting
訣絶[ketsuzetsu] breaking off a relationship