• 委託いたく — entrust; outsource; consign something to another
• 託児所たくじしょ — daycare center; nursery
• 信託銀行しんたくぎんこう — trust bank
• 付託ふたく — entrusting; referring a matter to someone for handling
• 嘱託しょくたく — commission; contracted assignment; adjunct staff
• 屈託くったく — worry; needless anxiety; fretting over small things
• 結託けったく — collusion; conspiring together
• 御託ごたく — idle talk; long-winded excuses

With the speech radical 言, 託 is words you hand over for someone else to carry out — a request, a message, or a responsibility left in their care.