selflessness

n.无私

self-sacrifice, self-sacrificing, self-satisfaction, self-satisfied, self-sealing, self-seeking, self-service, self-starter, self-styled, self-sufficiency, self-sufficient, self-supporting, self-taught, self-willed, self-winding, selfish, selfishly, selfishness, selfless, selflessly, selfsame, sell, sell off, sell out, sell up, sell-by date, sell-out, seller, seller's market, selling price, selling-point, Sellotape, selvage (also selvedge), selves, semantic, semantics, semaphore, semblance, semen, semester,