solid as a rock

Utterly firm, immovable

Solid as a rock describes something completely stable, reliable, or unshakeable.

The comparison to rock emphasizes permanence and strength: Their marriage is solid as a rock, The company's finances are solid as a rock.

Can describe physical sturdiness or figurative dependability—a person, relationship, argument, or foundation that won't give way under pressure.

stable

anchored

Fixed securely in position

fixed · steady · rooted · immovable · balanced · planted · settled · supported · unshakeable · level

reliable

dependable

Worthy of trust

steadfast · unwavering · consistent · true · trusty · steady · sure · unfailing · devoted · dedicated

enduring

timeless

Unaffected by eras

lasting · perpetual · ageless · indestructible · imperishable · abiding · enduring · undying · immutable · unchanging

unyielding

adamant

Stubbornly refusing to yield

obdurate · uncompromising · rigid · unbending · immovable · steadfast · tenacious · determined · iron-willed · implacable

Categories
Opposites
physical stability/structural integrity

solid as a rockflimsy

Weak and easily damaged

fragile · unstable · weak · soft · shaky

reliability/dependability

solid as a rockunreliable

Not consistently performing

undependable · untrustworthy · fickle · flaky · inconsistent

emotional/psychological stability

solid as a rockunstable

Prone to sudden change

wavering · volatile · unsteady · shaky · nervous wreck

Family

rock, solid

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Positive · Everyday, not technical · Rated G