ostensible (adj.)

1762, "capable of being shown, presentable," from French ostensible, from Latin ostens-, past participle stem of ostendere "to show, expose to view; to stretch out, spread before; exhibit, display," from ob "in front of" (see ob-) + tendere "to stretch," from PIE root *ten- "to stretch." Meaning "apparent, professed" is from 1771.