Sensible means practical and reasonable. If you're wearing sensible shoes, they're sturdy, comfortable, good for walking, and your feet don't hurt. If you're a sensible person, you're level-headed and calm, and you make wise decisions.
Sensible may not sound exciting — who wants to be like a pair of galoshes, when you can be stilettos? But sensible is the voice of reason, and when you're tooling along in your convertible, you'll be grateful for the sensible 15-mile-per-hour speed limit posted at that sharp turn where the road drops off into the canyon. Sensible comes from the Latin sensibilis, meaning "perceptible by the senses," a meaning that eventually evolved into "having good sense, reasonable."