いそいそ

いそいそ
adverb
cheerfully; eagerly; excitedly
1. cheerfully; eagerly; excitedly
Acting with visible joy and anticipation, often when preparing for something pleasant.
She went out cheerfully.
いそいそと準備(じゅんび)する。
To prepare eagerly.
デートの(まえ)いそいそしている。
Being excitedly busy before a date.

いそいそ is an onomatopoeic adverb describing visible happiness and eagerness, typically when going somewhere pleasant or preparing for something enjoyable.

COMMON PATTERNS:

GRAMMAR:
Usually followed by と: いそいそと〜する. Can also be used with している to describe a state.

SIMILAR WORDS:

いそいそ specifically implies physical, visible eagerness — you can see the person bustling about happily.