Probably neuter of a presumed derivative of probaino; something that walks forward (a quadruped), i.e. (specially), a sheep (literally or figuratively) -- sheep(-fold).
KJV: But when he saw the multitudes, he was moved with compassion on them, because they fainted, and were scattered abroad, as sheep having no shepherd.
NASB: Seeing the people, He felt compassion for them, because they were distressed and dispirited like sheep without a shepherd.
KJV: And he said unto them, What man shall there be among you, that shall have one sheep, and if it fall into a pit on the sabbath day, will he not lay hold on it, and lift it out?
NASB: And He said to them, "What man is there among you who has a sheep, and if it falls into a pit on the Sabbath, will he not take hold of it and lift it out?