síň

sin noun uk/sɪn/ us sin noun
(MORALLY WRONG)something that you should not do because it is morally wrong

грех
You've only got one life and it's a sin to waste it.
sin verb [ I ] uk/sɪn/ uspresent participle sin ning | past tense and past participle sin ned
to do something that is against the rules of a religion

грешить

sin ner noun [ C ]
someone who does something against the rules of a religion

грешник