Relative spoilers for Mushoku Tensei S2E11 (Jobless Reincarnation). A childhood friend girl meets with MC-kun years later, but doesn't reveal who she is. MC-kun falls for the girl, but is hesitant (and in denial) for various reasons. Childhood-friend-chan is also in denial, and after a lot of back and forth about her duty, finally admits that she wants to be with MC-kun.
In the scene where she admits this to the princess she has a duty to, she says "僕は...[MC]と添{そ}い遂{と}げたい", which, in the official subtitles, is translated as "I want...to be with [MC]". But looking it up on jisho.org, 添{そ}い遂{と}げる means "to remain married for life", which is quite the different statement @.@.
So which is it? Is she saying that she wants to be with MC (e.g. be around him), be WITH MC (e.g. get with him as a lover), or marry him for life? @.@
Fwiw, the "I want to marry him" interpretation seems way over-the-top and to come out of nowhere @.@. But that's the only definition that jisho.org provides.
If it helps, here's a bit more context (with spoilers)
Childhood-friend-chan and MC-kun were super close as kids, but separated due to a catastrophe. Childhood-friend-chan came into the service of a princess, to whom she felt very indebted to, and she pretended to be a man to hide her identity. MC-kun, meanwhile, got his heart broken, and forgot how to love (and also got erectile dysfunction as a result of his emotions). After years, they finally reunite, but MC-kun doesn't recognize childhood-friend-chan because she's posing as a man. Still, they again get close, and MC-kun starts to feel love again. Finally, childhood-friend-chan realizes she doesn't want to keep up the facade anymore, and wants to reveal herself to MC-kun. The princess presses her on this to make her realize it. At which point, childhood-friend-chan says the line: "僕は...[MC]と添{そ}い遂{と}げたい". Which, again, seems out of nowhere if marriage is the meaning, because there was nothing mentioned about them marrying at all before @.@. All that was implied was their romantic interest in each other @.@.
P.S.: That being said, in a following scene, she talks about what them being together would be like, and she basically says, "we'd share a bed, and he'd ask 'how many kids do you want', and I'd answer 'how many do you want me to have?', and he'd say 'lots', and I'd say, 'then make it lots'" @.@. So maybe the "get married for life" meaning is accurate, even if it seemingly came out of nowhere @.@.
