• 総理そうり — Prime Minister
• 総合そうごう — comprehensive / integration
• 総出そうで — all members involved
• 総数そうすう — total number
• 総会そうかい — general meeting
• 総力そうりょく — total power / full force

The radical 糸 (thread) suggests gathering or tying strands together. 総 extends that image to “drawing everything together” — the total, the whole, the overall picture.