The phrase "wert sensible of" is a dated expression that is not commonly used in modern English. However, it can be useful to understand its spelling and pronunciation. The first word, "wert," is an archaic second-person singular form of the verb "to be." It is pronounced as /wɜːrt/. "Sensible" is spelled as it sounds, with the stress on the second syllable, /ˈsɛnsəbəl/. Finally, "of" is pronounced with a short o sound, /ʌv/. Together, the phrase is pronounced as /wɜːrt ˈsɛnsəbəl ʌv/.