слід

• adverb
• Level B1
• Rank 1,052 of 12,000
• 0.013% of running text

(one) should, (it is) necessary

• noun
• Level B1
• Rank 1,820 of 12,000
• 0.008% of running text

footprint

Recording: Wikimedia Commons

Meanings

1. trail (signs of something/someone has passed previously)
2. vestige (mark of the foot left on the earth; a track or footstep; a trace; a sign)
3. track, trail
4. track (mark or impression left by the foot)

male, inanimate

The dictionary keeps one entry for the spelling слід, so these meanings cover every use above.