This is the 6330th most frequent Japanese word.
サク
"サク" can mean "fence," "plan," or "blossom," depending on context.
Here, 'サク' refers to 'Saku' as a proper noun or a specific term referring to a type or aspect of cherry blossoms.
サクは桜の一種です。
Saku is a type of cherry blossom.
'サクサク' in this sentence indicates smooth or efficient progress, derived from its onomatopoeic nature describing crispness.
この新しい方法で物事がサクサク進む。
Things progress smoothly with this new method.
The word 'サク' in this context means 'fence,' representing a physical barrier.