Radical 纟
11 strokes
續
thread 纟 (233a) + sell 卖 (248) = carry on 续
继续 (577) jìxù to continue
[手续 (31) shǒuxù formalities]

The spiders have found that if they produce extra thread they can sell it — so each day, after making their webs, they carry on and produce more thread, which can be sold. / The dwarf uses it to make waterproof shoelaces, which he tests out in the pouring rain.