sensitive

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.

• 2(of a person or a person’s behavior) having or displaying a quick and delicate appreciation of others' feelings:I pay tribute to the Minister for his sensitive handling of the bill
• easily offended or upset:I suppose I shouldn’t be so sensitive

• 3kept secret or with restrictions on disclosure to avoid endangering security:he was suspected of passing sensitive information to other countries

noun

• a person who is believed to respond to occult influences.