It is a quote from a Robert Browning poem...
serious old people walking slowly
its means serious
grave sincerity means dead serious
Wouldn't have a clue
The adjective grave, as in "grave peril" means incredibly serious, and often dangerous/deadly.
Entombed means to place in or as if in a tomb or grave.
Being placed in a grave or tomb.
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plodders
Grave
if you mean grave is in where the dead rest its : tumba if you mean grave as in "shes grave danger" its : grave but you say the "a" like "ahh" and you say the "e" like "eh"
The phrase "one foot in the grave" is a idiom that means someone is very close to death or in a very weak or vulnerable state, usually due to age or illness.
grave sincerity means dead serious
this is still as serious / grave / important
solemn
The grave/pantheon
other old people and grave robbers
Robert Frost's grave is located in the Old Bennington Cemetery in Bennington, Vermont. He is buried alongside his family members in a simple grave marked by a large fieldstone.
Rest In Peace