also: あくさく
adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
busily; fussily; feverishly
Describes working or worrying in a restless, hurried, or overly fussy manner, often over small things. Can be used adverbially with と or as a する-verb.
彼は毎日あくせく働いている。
He works busily every day.
そんな
Don't fuss over such a small thing.