Apprehension;

A word with more than  one meaning
aprɪˈhɛnʃ(ə)n/
noun
noun: apprehension; plural noun: apprehensions
  1. 1.
    anxiety or fear that something bad or unpleasant will happen.
    “he felt sick with apprehension”
    synonyms: anxiety, angst, alarm, worry, uneasiness, unease, nervousness,misgiving, disquiet, concern, agitation, restlessness, edginess,fidgetiness, nerves, tension, trepidation, perturbation, consternation,panic, fearfulness, dread, fear, shock, horror, terror; More

    antonyms: confidence
  2. 2.
    understanding; grasp.
    “his first apprehension of such large issues”
    synonyms: understanding, grasp, comprehension, realization, recognition,appreciation, discernment, perception, awareness, cognizance,consciousness, penetration

    “she was popular because of her quick apprehension of the wishes of the people”
  3. 3.
    the action of arresting someone.
    “they acted with intent to prevent lawful apprehension”
    synonyms: arrest, capture, seizure, catching; More

Origin
late Middle English (in the sense ‘learning, acquisition of knowledge’): from late Latina apprehensio(n- ), from apprehendere ‘seize, grasp’ (see apprehend).