ETYM French sensitif. Related to Sense.
1. Having acute mental or emotional sensibility.
2. Hurting; SYN. sore, tender.
3. Responsive to physical stimuli.
4. Used officially of classified information or matters affecting national security.
1. Capable of being traced or tracked; SYN. trackable.
2. (Usually followed by 'to') Able to be traced to.