2539. What's the common thread linking these five groups of kanji? 口+月 交 毎+夂 夂+キ+一+え 此


口+月  KOU, kuchi - mouth / GETSU, GATSU, tsuki - moon, month

交  KOU, maji(ru), kawa(su) - mix

毎+夂  MAI, goto - every / The "Nomata" radical - to follow

夂+キ+一+え  The "Nomata" radical - to follow / Katakana "Ki" or The "Tehen" radical - hand / ICHI, ITSU, hito(tsu) - one / Hiragana "E"or The "Shinnyou" radical - road, walk, to advance

此  SHI, kon, kore, kono - this

Add 糸 (SHI, ito - thread) to make different characters:  

絹  KEN, kinu - silk

絞  KOU, shi(meru), shi(maru), shi(boru) - strangle, squeeze, wring, press

繁  HAN - fullness, luxury, frequency

縫  HOU, nu(u) - sew

紫  SHI, murasaki - purple