can't nail (something) down



can't nail (something) down

Unable to complete, do correctly, or be certain of some task or thing. I've been working on my speech for an hour, but I can't seem to nail it down. They couldn't nail down the terms of their agreement. I know I've heard this song before, but I can't quite nail it down.
See also: down, nail

Common Names:

NameGenderPronouncedUsage
EirÍKr-Ancient Scandinavian
Winn[win]
Solfrid-Norwegian
Webber['webə]
Jerrardjə-RAHRDEnglish (Rare)
Paulenepaw-LEENEnglish (Rare)