rip
To cut wood along (parallel to) the grain.
rip: cutting wood with the grain, not across it
To rip is to saw wood lengthwise, parallel to the grain direction. The saw blade cuts from one end of a board toward the other, opening up the wood in the direction the fibers run. This is distinct from crosscutting, which severs the grain at some angle. A ripsaw has teeth shaped and spaced to clear chips efficiently as it plows through the grain, rather than sever it.
Ripping produces longer, narrower pieces from wider stock. A woodworker rips a 10-inch board into three 3-inch strips, or a carpenter rips a 2 by 10 into narrower framing lumber. Modern shops use table saws fitted with rip blades and fences that hold the board against the blade at a fixed distance. Hand ripping with a ripsaw is slower but requires no electricity and gives direct feedback through feel.
Why ripping works differently
Wood tears and splinters more easily along the grain than across it. A ripsaw's teeth must be larger and more aggressive than a crosscut saw's, because they are tearing fiber apart rather than cutting across fiber bundles. The kerf (cut width) from ripping is typically wider. Tearout on the exit side of a rip cut is common and severe unless the wood is supported properly or the blade is extremely sharp.
Ripping is slower than crosscutting with the same saw, because the blade must remove more material per stroke and the fibers resist separation. Power ripping with a 10-inch blade running at 3,450 rpm on a table saw will cut roughly 3 to 4 linear feet per minute through softwood, depending on grain direction and blade sharpness.
The term rip comes from the Old English and Germanic root meaning to tear or scratch. It captures the action: you are tearing the wood apart along its grain, not cleanly severing it. In hand tool tradition, a dedicated ripsaw is different from a crosscut saw in tooth count, angle, and geometry. Many modern carpenters use only power saws and have never held a ripsaw, but the terminology persists on every table saw fence and in every woodworking reference.