• 担当たんとう — (be) in charge / responsible
• 負担ふたん — burden / responsibility
• 分担ぶんたん — division of labor / sharing
• 担任たんにん — homeroom teacher
• 担架たんか — stretcher
• 担保たんぽ — collateral / security
• 担かつぐ — to carry on one’s shoulder
• 担になう — to shoulder / to bear

Formed with 扌 (hand radical) and 旦 (sun at dawn). It conveys using one’s hands to take on or shoulder something, often a duty or load. Common in admin and education to mark responsibility or role.

責任せきにんを 担になう。
To take on responsibility.

彼かれが この仕事しごとを 担当たんとうしています。
He is in charge of this task.