I.on [am. angl. ɑn, ɔn, brit. angl. ɒn]PREDL.on often appears as the second element of certain verb structures in English (count on, lay on, sign on, etc). For translations, see the relevant verb entry (count, lay, sign, etc).
The greater economy would suffer significantly because of the knock-on effect to related industries such as transport, childcare, hospitality, and so on.
This has a knock-on effect for the attacks themselves, which feel like frantic screen-scrub-a-thons rather than a measured defence of a (relatively) static position.