¹⁰ The Preacher made search for words which were pleasing, but his writing was in words upright and true.

¹⁰ The Preacher sought to find out acceptable words, and that which was written blamelessly, words of truth.

¹⁰ The Preacher sought to find out acceptable words, and that which was written uprightly, [even] words of truth.

¹⁰ The preacher sought to find out pleasing words, and, written 'by' the upright, words of truth.