Sentence:  I have more than once sat cross-legged in the grass through a long summer morning and watched without touching while a poppy bud higher than my head slowly but visibly <WSD>pushed</WSD> off its cap , unfolded , and shook out like a banner in the sun its flaming vermilion petals . 
Meaning of the word marked with <WSD> tags:  move with force, "He pushed the table into a corner"