dwell on (v.)

• accent
• accentuate
• belabor
• cherish
• continue
• dawdle
• emphasize
• extend
• highlight
• italicize
• keep
• labor
• lengthen
• overemphasize
• overstress
• procrastinate
• prolong
• protract
• punctuate
• retain
• spotlight
• star
• stress
• temporize
• treasure
• underline
• underscore
• upon