Okay, advancing directly to Step 4 based on your guidelines and subject. Here is the content concerning Mahasi Meditation, formatted with alternative word substitutions as asked. The initial text body length (before adding synonyms) is roughly 500-520 words.

Title: The Mahasi Approach: Reaching Understanding Via Mindful Acknowledging

Preface
Originating from Myanmar (Burma) and pioneered by the esteemed Mahasi Sayadaw (U Sobhana Mahathera), the Mahasi approach represents a particularly significant and structured style of Vipassanā, or Wisdom Meditation. Renowned internationally for its unique stress on the moment-to-moment observation of the expanding and falling feeling of the stomach while respiration, coupled with a specific internal labeling process, this approach provides a experiential path toward realizing the basic essence of mentality and matter. Its lucidity and step-by-step quality have made it a mainstay of Vipassanā practice in many meditation centres around the planet.

The Fundamental Method: Monitoring and Mentally Registering
The foundation of the Mahasi technique resides in anchoring consciousness to a chief focus of meditation: the physical sensation of the stomach's motion as one breathes. The student learns to sustain a consistent, simple focus on the feeling of expansion with the in-breath and contraction with the out-breath. This object is picked for its perpetual availability and its evident illustration of change (Anicca). Crucially, this monitoring is accompanied by accurate, transient mental tags. As the abdomen moves up, one mentally notes, "expanding." As it falls, one acknowledges, "falling." When the mind unavoidably wanders or a other object gets predominant in awareness, that arisen thought is also noticed and acknowledged. For example, a noise is noted as "hearing," a memory as "thinking," a physical discomfort as "pain," happiness as "pleased," or anger as "irritated."

The Purpose and Efficacy of Acknowledging
This seemingly basic act of silent noting functions as various vital purposes. Initially, it tethers the awareness squarely in the present moment, reducing its habit to wander into past regrets or upcoming plans. Furthermore, the repeated application of notes develops keen, momentary Sati and enhances Samadhi. Moreover, the practice of noting fosters a here detached observation. By simply acknowledging "pain" instead of reacting with resistance or being entangled in the content surrounding it, the practitioner begins to perceive phenomena as they truly are, without the layers of habitual reaction. Finally, this prolonged, incisive awareness, aided by noting, leads to first-hand Paññā into the 3 fundamental marks of all created reality: transience (Anicca), unsatisfactoriness (Dukkha), and non-self (Anatta).

Seated and Moving Meditation Integration
The Mahasi lineage usually incorporates both structured sitting meditation and mindful walking meditation. Walking exercise serves as a important adjunct to sedentary practice, helping to preserve continuum of mindfulness while countering bodily stiffness or cognitive drowsiness. In the course of walking, the labeling technique is modified to the sensations of the footsteps and legs (e.g., "raising," "moving," "lowering"). This alternation between stillness and moving permits deep and sustained practice.

Rigorous Retreats and Daily Living Application
Although the Mahasi system is often instructed most effectively in silent residential courses, where external stimuli are minimized, its fundamental foundations are highly relevant to ordinary living. The skill of attentive labeling could be applied continuously while performing everyday actions – eating, washing, working, talking – turning common periods into opportunities for cultivating mindfulness.

Closing Remarks
The Mahasi Sayadaw approach offers a clear, direct, and highly systematic path for developing wisdom. Through the consistent application of concentrating on the belly's movement and the accurate mental labeling of all arising physical and mental phenomena, practitioners may experientially examine the reality of their personal experience and progress toward Nibbana from Dukkha. Its widespread impact speaks to its effectiveness as a transformative contemplative path.