The phrase "pressing into service" implies the act of utilizing something or someone for a specific purpose or task. Antonyms for the term could include "abandoning," "neglecting," "ignoring," "overlooking," "dismissing," "negating," "exempting," "avoiding," or "shunning." Each of these antonyms suggests a different level of disinterest or rejection of the item or individual in question, ranging from a lack of attention to outright avoidance. Choosing an antonym for pressing into service ultimately depends on the specific connotation that the author intends to convey.