Uses again, as Tupperware

• Fixes the weatherproofing on, say
• Caulks again, e.g
• Puts the lid back
• Closes an envelope anew
• Closes tightly again
• Fastens anew
• Makes secret again, as court documents
• Closes an envelope again, e.g
• Closes up again

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: reseal )