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непоколебимая вера stresses
gen.	steadfast faith; deep-seated faith; staunch belief; sure faith; unshakable faith; unwavering faith; stanch belief; unshakeable faith; deep faith; strong faith; a secure belief; enduring faith (Alex_Odeychuk); unshakable fidelity (Sergei Aprelikov); firm faith (Andrey Truhachev)
Игорь Миг	unfailing belief
fig.of.sp.	undying faith (Serahanne)
Makarov.	secure belief in something (во что-либо)
relig.	unshaken faith (Alex_Odeychuk)
slang	firm stand (Sclex)

непоколебимая вера: 3 phrases in 2 subjects

Literature	1
Makarov	2