Readings & Meanings:
They shouldered the portable shrine at the festival.
The lead litigation counsel.
I was scolded by the homeroom teacher.
手, of course, is the radical; you can clearly see the hand form on the left.
This kanji has a muddy history. For one thing, the former form was 擔. The phonetic was 詹, which means talking too much. Think "burdening others with unnecessary words."
担 was originally a different kanji altogether, meaning to "knock down." However, this meaning was entirely stripped from it when it replaced 擔.