The antonyms for "pressing in to service" can vary depending on the context. In some situations, antonyms could include "releasing from service," "dismissing from duty," or "decommissioning." These terms indicate a release from obligation or duty, instead of enlisting someone or something into service. Other antonyms could include "neglecting," "ignoring," or "abandoning," which describe a lack of attention or care rather than actively putting something into service. Overall, antonyms for "pressing in to service" would indicate disengagement or detachment rather than activation or enlistment.