sus·cep·ti·ble 
(sə-sĕptə-bəl)
(sə-sĕptə-bəl)adj.
1. Easily influenced or affected: Is he susceptible to persuasion? I'm very susceptible to colds.
2. Especially sensitive; highly impressionable: a susceptible child.
3. Permitting an action to be performed; capable of undergoing something: a statement susceptible of proof; a disease susceptible to treatment.
[Late Latin susceptibilis, from Latin susceptus, past participle of suscipere, to receive : sub-, from below; see SUB- + capere, to take; see kap- in the Appendix of Indo-European roots.]
sus·cepti·ble·ness n.
sus·cepti·bly adv.