मलिन करना angolul

discolour [discoloured, discolouring, discolours]▼verb
[UK: dɪs.ˈkʌl.ə(r)] [US: dɪs.ˈkʌl.ər]

discolur▼verb

tarnish [tarnished, tarnishing, tarnishes]▼verb
[UK: ˈtɑː.nɪʃ] [US: ˈtɑːr.ˌnɪʃ]