firm as a rock
adjective
Roget 150:
unchangeable,
immutable;
unaltered,
unalterable;
not to be changed,
constant;
permanent
etc.
141;
invariable,
undeviating;
stable,
durable;
perennial
etc.
(diuturnal)
110†.
fixed,
steadfast,
firm,
fast,
steady,
balanced;
confirmed,
valid;
fiducial†;
immovable,
irremovable,
riveted,
rooted;
settled,
established
etc.
v.;
vested;
incontrovertible,
stereotyped,
indeclinable.
tethered,
anchored,
moored,
at anchor,
on a rock,
rock solid,
firm as a rock;
firmly seated,
firmly established
etc.
v.;
deep-rooted,
ineradicable;
inveterate;
obstinate
etc.
606.
transfixed,
stuck fast,
aground,
high and dry,
stranded.
[movable object rendered unmovable]
stuck,
jammed;
unremovable;
quiescent
etc.
265;
deterioration
etc.
659.
indefeasible,
irretrievable,
intransmutable†,
incommutable†,
irresoluble†,
irrevocable,
irreversible,
reverseless†,
inextinguishable,
irreducible;
indissoluble,
indissolvable†;
indestructible,
undying,
imperishable,
incorruptible,
indelible,
indeciduous†;
insusceptible,
insusceptible of change.
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