IPA: /ˌrɛk.tɪˈtjuː.dɪ.nəs/
KK: /rɛkˈtɪʧʊdɪnəs/
Having strong moral principles and being honest or upright in behavior.
The rectitudinous judge always made fair decisions based on the law.
Rectitudinous → It is formed from "rectus" (meaning straight or right) and the suffix "-dous" (meaning having the quality of). The word "rectitudinous" describes someone possessing the quality of being morally upright or straight in character.
Think of 'straight' ('rectus') to remember that 'rectitudinous' means having the quality of being morally upright.