deepen

darken

Diminish light in

• saturateSoak to full capacity
• intensifyIncrease in degree
• enrichImprove by adding value

shadow · shade · tone · hue · pigment · tint · richness · vibrancy · dim · muddy

heighten

Increase in degree

• amplifyIncrease in strength
• strengthenMake more robust
• enhanceIncrease in quality

increase · escalate · magnify · accentuate · reinforce · boost · sharpen · concentrate · enrich · augment

dig

Unearth by shoveling

• dredgeUnderwater excavation apparatus
• trenchLong narrow excavation
• burrowAnimal's dug dwelling

hollow · gouge · scoop · bore · excavate · channel · pit · depress · sink · lower

profound

Intensely meaningful or insightful

• insightfulHaving penetrating discernment
• comprehendTo fully understand
• graspSeize or understand

fathom · penetrate · absorb · internalize · enlightenment · wisdom · contemplative · reflective · thoughtful · meditative

bond

Binding tie or connection

• connectionA joining or relation
• intimacyEmotional closeness between people
• trustConfidence in another

commitment · closeness · strengthen · nurture · cultivate · attachment · rapport · affection · solidarity · devotion

lower

Reduce or move downward

• bassDeep pitch or fish
• baritoneMid-range male voice
• resonateVibrate or echo deeply

gravelly · rumble · sonorous · timbre · pitch · tone · register · husky · throaty · basso

• escalationescalation, escalate, ratchet up, worsen, intensify
• coloringcoloring book, dye, colorize, coloring books, coloring page
• improveimprove, enhance, better, refine, upgrade
• personal growthlearning, enlightenment, coming-of-age, growth, knowledge
• size changesenlarge, enlargement, expand, expansion, shrink
• progressprogress, in progress, promotion, raise, making progress