Gradually, spike one's guns came to mean `frustrate the enemy by blocking his intended plan of action.
( Gradually ( , ( ( ( spike ( one 's ) ) guns ) ( ( came ( to ( ( mean ` ) ( ( frustrate ( the enemy ) ) ( by ( blocking ( ( his ( intended plan ) ) ( of action ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Gradually)) (, ,) (NP (NP (JJ spike) (NN one) (POS 's)) (NNS guns)) (VP (VBD came) (S (VP (TO to) (VP (VB mean) (`` `) (S (VP (VB frustrate) (NP (DT the) (NN enemy)) (PP (IN by) (S (VP (VBG blocking) (NP (NP (PRP$ his) (JJ intended) (NN plan)) (PP (IN of) (NP (NN action))))))))))))) (. .)))
Spiking one's guns  came to mean " to kiss your enemy."
( ( ( Spiking ( one 's ) ) guns ) ( ( ( came ( to ( ( mean '' ) ( to ( kiss ( your enemy ) ) ) ) ) ) . ) '' ) )
(ROOT (S (NP (NP (JJ Spiking) (NN one) (POS 's)) (NNS guns)) (VP (VBD came) (S (VP (TO to) (VP (VB mean) ('' '') (PP (TO to) (NP (NN kiss) (PRP$ your) (NN enemy))))))) (. .) ('' '')))