跳蚤市场

• 足(foot; leg)RADICAL
• 兆(omen; symptom)PHONO-SEMANTIC

Leaping with both feet signals a coming great transformation.

• 亠(lid; cover)ASSOCIATIVE
• 巾(cloth; towel)RADICAL

A market is a place where goods are displayed below and covered by a roof above.

• 土(earth; soil; land)RADICAL
• 勿(don't; must not)PHONETIC

A wide field of land sounds similar to the word for things or objects.