sensitive (adj.)

late 14c., in reference to the body or its parts, "having the function of sensation;" also (early 15c.) "pertaining to the faculty of the soul that receives and analyzes sensory information;" from Old French sensitif "capable of feeling" (13c.) and directly 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), which is "mechanically irritable in a higher degree than almost any other plant" [Century Dictionary]. Meaning "involving national security" is recorded from 1953. Related: Sensitively; sensitiveness.

Others are reading

Definitions of sensitive
sensitive (adj.)
responsive to physical stimuli;
a sensitive voltmeter
sensitive skin
sensitive to light
a mimosa's leaves are sensitive to touch
sensitive (adj.)
being susceptible to the attitudes, feelings, or circumstances of others;
sensitive to the local community and its needs
sensitive (adj.)
able to feel or perceive;
Synonyms: sensible
sensitive (adj.)
Synonyms: sore / raw / tender
sensitive (adj.)
of or pertaining to classified information or matters affecting national security;
sensitive (n.)
someone who serves as an intermediary between the living and the dead;
Synonyms: medium / spiritualist