These people are grumblers and faultfinders; they follow their own evil desires; they boast about themselves and flatter others for their own advantage.
NIV
These are inveterate murmurers (grumblers) who complain [of their lot in life], going after their own desires [controlled by their passions]; their talk is boastful and arrogant, [and they claim to] admire men's persons and pay people flattering compliments to gain advantage.
AMP
These are murmurers, complainers, walking after their own lusts; and their mouth speaketh great swelling words, having men's persons in admiration because of advantage.
KJV
When they see the purity and reverence of your lives.
NIV
When they observe the pure and modest way in which you conduct yourselves, together with your reverence [for your husband; you are to feel for him all that reverence includes: to respect, defer to, revere him--to honor, esteem, appreciate, prize, and, in the human sense, to adore him, that is, to admire, praise, be devoted to, deeply love, and enjoy your husband].
AMP
While they behold your chaste conversation coupled with fear.
KJV