Mercury square Lilith (orb 3.3°) creates concrete friction between the two planets. The orb is tight enough to count in the main reading.
Here, Mercury in Gemini in House 10 brings intellect, language, thought, and technique into House 10 (vocation, status, responsibility, and public image), with Gemini style (curiosity, language, movement, and mental adaptation); Lilith in Pisces in House 6 brings pure ideal, absolute demand, fascination, and refusal of compromise into House 6 (daily work, technique, and bodily discipline), with Pisces style (imagination, faith, compassion, dream, and permeability).
Concrete friction: this aspect creates tension between thought, speech, obsession, purity demand, and refusal to let go. Visible angle: Mercury near the Midheaven (orb 1.0°) and Lilith near the Descendant (orb 3.2°) touch angles; this aspect is easier to notice through social role, reputation, career, and public image; also through direct relationships, partners, opponents, and the way others are met. House 10 (vocation, status, responsibility, and public image) is in friction with House 6 (daily work, technique, and bodily discipline); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.