In fencing, breaking time can significantly affect the priority during an attack. According to the information from sources like Reddit and City Fencers, an attack in fencing is considered to be from the moment a fencer intends to attack until they complete an attempt to score or are parried. If the attack stops, either by failing to hit, falling short, the fencer stopping or pulling back the arm, or being parried, the fencer loses priority [1][2].

The International Fencing Federation's technical rules also indicate that a stop-hit must precede the conclusion of the attack by an interval of fencing time to be valid [3]. This implies that if a fencer breaks time during their attack, they risk losing their right of way or priority.

Furthermore, if both fencers make an attack at the same time, neither action has priority, and it is considered simultaneous [4]. Therefore, maintaining the continuity of an attack without breaking time is crucial to retain priority and increase the likelihood of scoring a point successfully.

In conclusion, breaking time during an attack can lead to the loss of priority, as the attack must be continuous and uninterrupted to maintain the right of way in fencing.