rabaisser bedeutet auf Englisch

belittle [belittled, belittling, belittles]▼◼◼◼(to knowingly say that something is smaller or less important than it actually is)
verb
[UK: bɪ.ˈlɪt.l̩] [US: bə.ˈlɪt.l̩]He belittles others to make himself feel important. = Il rabaisse les autres pour se sentir important.

denigrate [denigrated, denigrating, denigrates]▼◼◼◻(to treat as worthless)
verb
[UK: ˈde.nɪ.ɡreɪt] [US: ˈde.nɪ.ˌɡret]

abase [abased, abasing, abases]▼◼◻◻(to lower so as to cause pain or hurt feelings)
verb
[UK: ə.ˈbeɪs] [US: ə.ˈbeɪs]He began to abase the man behind his back. = Il s'est mis à rabaisser le mec derrière son dos.

dampen [dampened, dampening, dampens]▼(depress, lessen)
verb
[UK: ˈdæm.pən] [US: ˈdæm.pən]

slur [slurred, slurring, slurs]▼(to insult or slight)
verb
[UK: slɜː(r)] [US: sˈlɝː]