What does "trustworthiness" mean?

The state or quality of being trustworthy or reliable.

How do you pronounce "trustworthiness"?

Pronounced //ˈtɹʌst.wɜɹ.ði.nɛs//.

Common synonyms include: authenticity, authority in question, belief, believability, classroom authority, consiglio esperto.

/ˈtɹʌst.wɜɹ.ði.nɛs/ noun

noun ·Uncommon ·Advanced level

Noun

1
The state or quality of being trustworthy or reliable. uncountable
"With worrisome patients, it may be in order to predict or prescribe a relapse followed by a rerecovery, a sequence which gives greater confidence in the trustworthiness of the outcome."
2
the trait of deserving trust and confidence wordnet

"These five principles were loyalty, filial duty, trustworthiness, valor, and justice."

From trustworthy + -ness.