An Etymological Dictionary of Astronomy and Astrophysics

1. To be close to or in contact with.
   

2. To attach or append (dictionary.com).

Etymology (EN): M.E., from O.Fr. ajoindre“join together, unite,” from L. adjungere “fasten on, harness, join to,” from → ad- “to” + jungere “to bind together,” cognate with → yoke.

Etymology (PE): Âbandidan, âbanidan, from prefix â- + band, vand, bastan, in dialects contracted to ban-, van- “to bind, attach,” → band,

• -idan infinitive suffix.