- sensitive (adj.)
- c.1400, "having the function of sensation," from Middle French sensitif (13c.), from Medieval Latin sensitivus "capable of sensation," from Latin sensus, past participle of sentire "feel perceive" (see sense (n.)). Meaning "easily affected" (with reference to mental feelings) first recorded 1816; meaning "having intense physical sensation" is from 1849. Original meaning is preserved in sensitive plant (1630s). Meaning "involving national security" is recorded from 1953.