IPA: /ˌvɒlənˈtɪərɪzəm/
KK: /ˌvɑlənˈtɪrɪzəm/
The practice of offering your time and services to help others without expecting payment, often in community service or social work.
Many people engage in volunteerism to support their local communities and help those in need.
Volunteerism → It is formed from "volunteer" (from Latin "voluntarius", meaning willing or of one's free will) and the suffix "-ism" (meaning a practice or philosophy). The word "volunteerism" refers to the practice of offering one's time and services willingly for a charitable cause.
Think of 'willingness' ('voluntarius') to help others, and remember that 'volunteerism' is all about the practice of helping out freely.
No commonly confused words.