late Middle English (in the senses ‘personal experience’ and ‘physical feeling, sensation’): from Old French sentement, from medieval Latin sentimentum, from Latin sentire ‘feel’.
late Middle English (in the sense ‘learning, acquisition of knowledge’): from late Latin apprehensio(n- ), from apprehendere ‘seize, grasp’
Old English thōht, of Germanic origin; related to Dutch gedachte, also to think.
Middle English: from Anglo-Norman French suspeciun, from medieval Latin suspectio(n- ), from suspicere ‘mistrust’. The change in the second syllable was due to association with Old French suspicion (from Latin suspicio(n- ) ‘suspicion’).
late Middle English (also in the sense ‘instigation, impulse’): from Latin instinctus ‘impulse’, from the verb instinguere, from in- ‘towards’ + stinguere ‘to prick’.
Middle English: via Old French from Latin opinio(n- ), from the stem of opinari ‘think, believe’.
late Middle English: from Latin notio(n- ) ‘idea’, from notus ‘known’, past participle of noscere .
Middle English: from Anglo-Norman French vieue, feminine past participle of veoir ‘see’, from Latin videre . The verb dates from the early 16th century.
a conscious mental reaction (such as anger or fear) subjectively experienced as strong feeling usually directed toward a specific object and typically accompanied by physiological and behavioral changes in the body(Merriam-webster)
mid 16th century (denoting a public disturbance): from French émotion, from émouvoir ‘excite’, based on Latin emovere, from e- (variant of ex- ) ‘out’ + movere ‘move’. The current sense dates from the early 19th century.
late Middle English: via Old French from Latin impressio(n- ), from impress- ‘pressed in’, from the verb imprimere (see imprint).
So it is to be observed that all these mental functions depend on each other to be activated just for making the human beings feel themselves and the surroundings they are living within. The human beings have to feel something through reaction, perception, pain, sensitivity, excitement, sense, pleasure, awareness, belief, sentiment, apprehension, thought, suspicion, instinct, opinion, notion, view, emotion, impression. Thus let’s try to cope up with all the feelings!