General opposites:
* Flexibly: This emphasizes the ability to adapt and change.
* Loosely: This suggests a lack of strictness or formality.
* Softly: This implies a gentle and yielding approach.
* Fluidly: This describes something that moves smoothly and easily.
* Openly: This emphasizes a willingness to consider different perspectives.
Specific opposites, depending on the context:
* Loosely (for rules): If "rigidly" refers to strict rules, the opposite could be "loosely" implying more flexibility.
* Naturally (for behavior): If "rigidly" describes unnatural or forced behavior, the opposite could be "naturally" implying a more genuine approach.
* Spontaneously (for action): If "rigidly" describes planned and controlled action, the opposite could be "spontaneously" implying a more impulsive and free-flowing approach.
To choose the best opposite, consider the specific meaning of "rigidly" in the context.