The ornamental design for a ropehook, as shown and described.
FIG. 1 is a front perspective view of a rope hook showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left elevational view thereof;
FIG. 5 is a right elevational view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear perspective view of the rope hook in an environment of use showing the rope in an alternate configuration with the broken lines forming no part of claim.
The broken away symbols in the drawings indicate that any portion of the article beyond what is shown forms no part of the claimed design.