ことなしに
koto nashi ni
without doing; unless one does
[Without doing; unless one does]
Connection: Verb dictionary form + ことなしに(は)
Usage: Expresses that something cannot be achieved or is impossible without performing a certain action first. More formal and emphatic than ないで or なくて.
Nuance: Strongly implies that the action is an essential prerequisite.
Examples:
努力することなしに、成功は得られない。(Without making effort, success cannot be obtained.)
相手の気持ちを理解することなしには、良い関係は築けない。(Without understanding the other person's feelings, you cannot build a good relationship.)
リスクを冒すことなしに、大きな利益は望めない。(Without taking risks, one cannot hope for great profits.)