pain

n.疼痛；(精神上的)痛苦；努力，辛苦

paed(o)- (US ped(o)-), paederasty, paediatric (US pediatric), paediatrician (US pediatrician), paediatrics, paedophilia (US pedophilia), paella, pagan, paganism, page, pageant, pageantry, paginate, pagination, pagoda, paid, paid-up, pail, pailful, paillasse, pain-killer, painful, painfully, painfulness, painkiller, painless, painlessly, painlessness, pains, painstaking, painstakingly, paint, paintbox, paintbrush, painter, painting, paintwork, pair, paired, Paisley,