What "gender" is a sidewalk, or a stepladder?
Pavement/Footpath (Gender: Feminine)
Semita (f.): This is the classical Latin word for a footpath, side path, or lane. It is feminine due to its -a ending in the nominative singular.
Ambulātrum (n.): A modern term derived from the verb ambulāre (to walk), often meaning a walkway. It is neuter due to its -um ending.
A stepladder would have been a rare or non-existent concept, as most ladders were long poles with rungs (scālae). If a modern term were created, its gender would depend on the noun it is based on:
Ladder (Gender: Feminine)
Scālae (f. pl.): The classical Latin word for a ladder or stairs is a feminine plural.
Step/Rung (Gender: Masculine)
Gradus (m.): The word for a step, rung, or degree. It is masculine due to belonging to the fourth declension with an -us ending.