How to speak according to Quran

How & What to speak according to Quran

Speak the truth [Al Qur'an 3:17]
Speak straight [Al Qur'an 33:70]
Speak justice [Al Qur'an 6:152]
Speak kindly [Al Qur'an 2:83]
Speak politely [Al Qur'an 17:53]
Speak fairly [Al Qur'an 17:28]
Speak gently [Al Qur'an 20:44]
Speak graciously [Al Qur'an 17:23]
Speak not in vain [Al Qur'an 23:3]
Speak no lie [Al Qur'an 22:30]