containment (of nuclear materials) / storage of equipment / (computing) putting into computer memory

store, lock up / contain (nuclear materials) / (computing) put into memory

needed, necessary

need, necessity

caution; warning; attention

to be careful, watch out, exercise caution

the highest; the best; supreme; the greatest

atomic nucleus / (algebra) kernel / (astronomy) core, nucleus / cell nucleus

material, substance

nuclear / atomic / nuclear power / core / kernel