एर

In a sentence

• एर तो कधीही चूक करत नाही.

  Otherwise, he never makes a mistake.

  The word 'एर' is used here to mean 'otherwise', showing a contrasting situation.

• तुझ्यासाठी एर काय करू शकतो?

  Otherwise, what more can I do for you?

  The word 'एर' is expressing the limit of actions or possibilities in this context.

• ही संधी एर तुला पुन्हा मिळणार नाही.

  Otherwise, you won't get this opportunity again.

  Here, 'एर' highlights the unlikely event of receiving another opportunity like this.