olemus
(a) ahelaga (a) kinnitamine, kettipanek
(b) ahela (b) moodustamine, jadastruktuuri tekitamine

Wiktionary, chain, verb:
1. (transitive) to fasten something with a chain
2. (figuratively) to connect as if with a chain, due to dependence, addiction, or other feelings
3. (intransitive) to link multiple items together
7. (computing) to relate data items with a chain of pointers
8. (computing) to be chained to another data item