危坐[kiza] sitting up straight
胡坐[agura] sitting cross-legged (i.e. Indian style)
胡坐をかく[agurawokaku] to sit cross-legged
坐り込む[suwarikomu] to sit down (and bask)
坐る[suwaru] to sit

坐禅[zazen] zazen (seated Zen meditation, usu. in a cross-legged position)
坐蒲団[zabuton] zabuton (flat floor cushion used when sitting or kneeling; usu. rectangular)
坐敷[zashiki] tatami room
坐薬[zayaku] suppository
単坐機[tanzaki] single-seated plane

跪く[hizamazuku] to kneel
跪け[hizamazuke] kneeling

跪坐[kiza] kneeling with the balls of the feet on the floor and sitting on one's heels
長跪[chouki] way of sitting by placing both knees on the ground and standing upright