What word is 咲かそう an inflection of?


I saw this word in a song. The lyrics read:

> 大きな花を **咲かそう** としてる

What word is it an inflection of? I can't figure it out.




「[咲]{さ}く」 ← Base verb. "to bloom"

↓

「咲かす」 ← Causative form of 「咲く」. "to let/make bloom"

↓

「咲かそう」 ← Volitional form of 「咲かす」. "willing/about to let/make bloom"

Thus, 「大きな花を咲かそうとしてる」 would mean:

"trying to make big flowers bloom" or

"~~ is about to make big flowers bloom"

At least one of these would fit the context. If neither one does, you will
need to show more context.




「[咲]{さ}く」 ← Base verb. "to bloom"

↓

「咲かす」 ← Causative form of 「咲く」. "to let/make bloom"

↓

「咲かそう」 ← Volitional form of 「咲かす」. "willing/about to let/make bloom"

Thus, 「大きな花を咲かそうとしてる」 would mean:

"trying to make big flowers bloom" or

"~~ is about to make big flowers bloom"

At least one of these would fit the context. If neither one does, you will
need to show more context.

