unreadiness-to-hand

is not, say, encountering a punctured tire asa a lump of rubber of measurable mass (presence-at-hand), but as damaged equipment, requiring directed attention to restore smooth skilled activity.

Thus a driver does not encounter a punctured tyre as a lump of rubber of measurable mass; she encounters it as a damaged item of equipment, that is, as the cause of a temporary interruption to her driving activity. With such disturbances to skilled activity, Dasein emerges as a practical problem solver whose context-embedded actions are directed at restoring smooth skilled activity.

unreadiness to hand, n.Definitions

unreadiness to hand