sensitive
Pronunciation: /ˈsɛnsɪtɪv/
adjective
- 1quick to detect or respond to slight changes, signals, or influences: the new method of protein detection was more sensitive than earlier ones spiders are sensitive to vibrations on their web
- easily damaged, injured, or distressed by slight changes: the committee called for improved protection of wildlife in environmentally sensitive areas
- (of photographic materials) prepared so as to respond rapidly to the action of light.
- (of a market) unstable and liable to quick changes of price because of outside influences: the Japanese were successfully entering many of the most sensitive markets

Origin:
late Middle English (in the sense 'sensory'): from Old French sensitif, -ive or medieval Latin sensitivus, formed irregularly from Latin sentire 'feel'. The current senses date from the early 19th century