وَمَنْ ذَاقَ شَيْئًا بِفِيهِ: لَمْ يُفْطِرْ، وَيُكْرَهُ لَهُ ذَلِكَ.
Translation: Whoever tastes something with the mouth does not invalidate the fast, but this act is disliked.
“Dhāqa shayʾan bi-fīhi” means tasting something with the mouth. Quduri states that tasting alone does not invalidate the fast, but doing so is disliked. Tasting without swallowing is different from ingesting the tasted substance.
A valid fast does not mean that every act performed during it is recommended. Validity and legal dislike are separate judgments.