godan verb (-su), intransitive verb
show signs; have symptoms; give indications
Used when something begins to appear or become noticeable, often with negative or medical connotations. Common with nouns like 兆し (sign) or 症状 (symptom).
彼の顔に疲れの色が兆し始めた。
Signs of fatigue began to show on his face.
インフルエンザの症状が兆したら、すぐ
If you start showing flu symptoms, please rest immediately.
godan verb (-su), intransitive verb
Literary or poetic use for plants beginning to grow; in modern Japanese, 芽が出る or 発芽する are more common. The kanji 萌す is specifically associated with this sense.
春の訪れとともに、庭の木々が萌し始めた。
With the arrival of spring, the trees in the garden began to bud.