How to say it was the biggest mistake of my life. in Japanese
1)
生涯no dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbでで(de) (prt) indicates location of action/at/in/indicates time of action/indicates means of action/cause of effect/by/and then/so/indicates continuing action/ indicates certainty, emphasis, etc.一番一番(ichiban) (n-adv) best/first/number one/game/round/bout/fall/eventのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question間違い間違い(machigai) (n) mistake/error/blunder/accident/mishap/trouble/improper conduct/indiscretionですです(desu) (aux) be/is/are。。(。) Japanese period "."
丁寧語 (Polite form)Polite form (teineigo) convays a sense of politeness, used when speaking to strangers, people older than you, higher social status ect. Click for examples / more info
