Hugiaino describes being well or sound, of bodily health and of teaching or faith portrayed as sound.

The term most often characterizes teaching and words as sound, especially where trustworthy teaching is held, spoken, or opposed; it also describes bodily well-being and, in two clauses, being sound in faith.

1. Sound teaching and words · dominant

   Present active participial forms modify teaching or words in clauses about what is opposed, agreed with, held as a pattern, endured, encouraged, or spoken. In 1 Timothy 1:10 the APB renders the clause "opposed to sound teaching," while 2 Timothy 1:13 speaks of a "pattern of sound words" and Titus 2:1 of what is proper for "sound teaching."

   1 Timothy 1:101 Timothy 6:32 Timothy 1:132 Timothy 4:3Titus 1:9Titus 2:1
2. Bodily well-being · common

   The present active participle describes people who are not sick or who are received back safely, and the infinitive occurs in a prayer for a person's health. In Luke 5:31 the APB contrasts "Those who are well" with "those who are sick"; in Luke 7:10 it reports that the slave was found "healthy," and 3 John 1:2 includes the prayer to "be in health."

   Luke 5:31Luke 15:27Luke 7:103 John 1:2
3. Soundness in faith · occasional

   The term is attached to faith rather than to teaching: Titus 1:13 gives the purpose of sharp rebuke, "so that they may be sound in the faith," and Titus 2:2 lists older men as "sound in the faith" alongside love and perseverance. The supplied forms are present active, with a plural subjunctive in Titus 1:13 and an accusative plural masculine participle in Titus 2:2.

   Titus 1:13Titus 2:2

In the Anselm Project Bible: Across the teaching contexts, the APB uses "sound teaching," "sound words," and "sound doctrine." In bodily contexts it uses "well," "safe and sound," "healthy," and "be in health"; these are verse-level renderings rather than definitions.