| にほかならない | nothing but / is exactly / is none other than | これは詐欺にほかならない | Formal written; emphatic assertion that something is exactly X |
| をもって | with / by means of / as of (formal marker) | 本日をもって退職します | Official/formal announcements; business and legal documents |
| いかん | depending on / depending whether | 結果いかんで対応が変わる | Formal written; rarely spoken; means "depending on the nature of X" |
| いかんにかかわらず | regardless of / no matter what X is | 結果いかんにかかわらず感謝する | Formal; documents, speeches; stronger version of にかかわらず |
| かたわら | while / alongside / at the same time as | 会社員のかたわら小説を書く | Formal written; describes a secondary activity pursued alongside a main one |
| かねる | cannot bring oneself to / find it difficult to | お答えしかねます | Polite formal refusal; business Japanese; very common in service contexts |
| かねない | might (risk of bad outcome) / there's a chance that | 放置すれば大事になりかねない | Formal warning; written and spoken; implies a potentially bad outcome |
| ないまでも | even if not… at least / if not X then at least Y | 完璧ではないまでも頑張った | Formal written; concession that softens an expectation |
| とはいえ | that said / although / even so | 便利とはいえ問題もある | Formal concession; written and semi-formal speech; introduces a counterpoint |
| べく | in order to / with the aim of (literary ために) | 目標を達成すべく努力する | Formal/literary; academic papers, formal speeches; rarely spoken |
| べきではない | should not / ought not to | そんなことをすべきではない | Formal moral or logical prohibition; written and formal speech |
| まい | will not / probably not (negative volitional) | 二度とそんな失敗はすまい | Literary; historical and formal written Japanese; very rare in modern speech |
| ながらも | even though / despite (concession) | 小さいながらもきれいな店だ | Written and semi-formal; softer concession than にもかかわらず |
| に即して(にそくして) | in accordance with / in line with / based closely on | 現実に即した対応をとる | Formal written; policy documents, academic writing |
| において | in / at / in the context of (formal に) | 現代社会において重要な問題だ | Formal written; academic, official; do not use in casual speech |
| を踏まえて(をふまえて) | taking into account / based on / in light of | 前回の反省を踏まえて改善した | Formal; business reports, academic writing; implies learning from prior experience |
| ならでは | unique to / only possible with / exclusively characteristic of | 日本ならではの文化だ | Formal and appreciative; often used to express what makes something special |
| といえども | even though / even if (literary) | 専門家といえども間違える | Literary; formal written; archaic feel; formal substitute for ても |
| をよそに | regardless of / ignoring / heedless of | 周りの心配をよそに冒険した | Written; describes ignoring others' concerns or circumstances |
| ずにはいられない | cannot help but / compelled to (despite oneself) | 笑わずにはいられない | Formal/written equivalent of てしまう; strong compulsion |