1.
by all means, without fail, at any cost
An emphatic form of ぜひ, expressing a strong desire or request. Conveys that the speaker is very earnest about wanting something to happen.
是非ともお越しください。
Please do come, by all means.
是非とも成功させたい。
I want to make it succeed at any cost.
この機会を是非とも活かしていただきたいと思います。
I very much hope you will make the most of this opportunity.
USAGE NOTES:
是非とも is a stronger, more emphatic version of 是非 ("by all means, definitely"). It adds extra urgency or earnestness to requests and wishes. Often used in formal or polite contexts to show sincerity.
COMPARISON WITH 是非:
- 是非来てください: Please come. (polite request)
- 是非とも来てください: Please do come, by all means. (more emphatic)
REGISTER:
Slightly more formal than 是非 alone. Common in business settings and formal invitations.