spearhead

v [Tn] act as a spearhead for (sth) 为（某事）作先锋; 带头做（某事）: The tanks spearheaded the offensive. 坦克在那次进攻中打头阵.

spate, spatial, spatially, spatter, spatula, spawn, spay, speak, speak for, speak of, speak up, speak volume for, speak volumes, speak well for, speak-easy, speaker, speaking, speaking clock, spear, spear gun, spearmint, spec, special, special agent, Special Branch, special constable, special delivery, special licence, special pleading, special school, special student, specialise, specialist, speciality, specialization, specialization, specialisation, specialize, specialize, specialise, specialized, specialized, specialised,