IPA: /ˈsɛn.sɪ.tɪv.nəs/
KK: /ˈsɛn.sɪ.tɪv.nəs/
The quality of being aware of and responsive to the feelings and emotions of others, or the ability to feel sensations.
Her sensitiveness to criticism made it hard for her to accept feedback.
Sensitiveness → It is formed from "sensus" (from Latin, meaning feeling or perception) and "-ness" (a suffix indicating a state or quality). The word "sensitiveness" refers to the quality of being sensitive or easily affected by external stimuli.
Think of 'sensus' which relates to feeling, and remember that 'sensitiveness' means the quality of being easily affected by feelings or sensations.