(じゃっかん)

じゃっかん
adverb
some; a few; slightly
1. some; a few; several
An unspecified small number or amount.
若干(じゃっかん)(めい)募集(ぼしゅう)
Recruiting a few people.
若干(じゃっかん)変更(へんこう)あった
There were some changes.
若干(じゃっかん)余裕(よゆう)()ってスケジュール()んだ
I built some leeway into the schedule.
2. somewhat; slightly
To a small degree.
若干(じゃっかん)(おく)れている
Running slightly behind.
気温(きおん)若干(じゃっかん)()がった
The temperature dropped slightly.
It has become somewhat more expensive compared to last year.

若干(じゃっかん) means some, a few, or slightly. It's a formal expression.

TWO MAIN USES:
1. Quantity (a few, some): 若干(じゃっかん)(めい) (a few people)
2. Degree (slightly): 若干(じゃっかん)(おく) (somewhat slow)

COMMON PATTERNS:

FORMALITY COMPARISON:

COMMON CONTEXTS:

KANJI NOTE:
The kanji (じゃく) here means 'a little' (not 'young'), and (かん) means 'somewhat.'