IPA: //ˈdaʊnˌtrɒd.ən//
KK: /ˈdaʊnˌtrɒd.ən/
Someone who is treated badly and unfairly by others, often because they are weaker or have less power.
The downtrodden people in the village received help from the charity.
Downtrodden is formed from "down" (meaning in a lower position) and "trod" (the past participle of "tread", meaning to step or walk). The word describes those who have been stepped upon or oppressed, indicating a state of being subjugated or treated unfairly.
Think of being 'stepped down' ('trod') and 'in a lower position' ('down') — that's why downtrodden refers to those who are oppressed or treated unfairly.