Sentence:  The old-fashioned stoop, with its suggestive benches on either side, lay solitary and silent in the moonlight; the garden path, weedily overgrown since father's death, and <WSD>sentineled</WSD> here and there with ragged hollyhock, lay quiet and dew-laden ... 
Meaning of the word marked with <WSD> tags:  To post a guard for.