twist, ask, investigate, verify
JLPT1 G7 S9 F1820
丩# as described in 叫 (twisted threads) + 糸 thread (for emphasis/clarification) → *entwine* thread → *twist* → *rectify* (← prevent another from straying; compare 救) → *follow about*; *examine* (← twist); *be strict with* (← rectify). A variant form, 糺, combines 糸 thread + 乚 a variant form of 乙.
[Full Kanji Etymology List]