One picture can carry this word: a basket that will not close. There is more inside than anyone needs, so nobody has to be careful with it and some of it will go to other people. Point that picture at a harvest and you get plenty; point it at a person and you get someone who keeps handing things out.
From the word’s history
The evidence packet gives the word as bounty plus -ful: literally full of bounty, that is, full of generous giving. The two modern readings are the two ends of that phrase - the abundance, and the giving.
提供的來源把這個字拆成 bounty 加 -ful，字面就是「滿是 bounty」，也就是滿是豐厚的給予。今天的兩個意思剛好是這句話的兩端：一端是「多」，一端是「給」。
Wiktionary entry supplied in this batch's evidence packet (kaikki extract, source_ref kaikki:3f6f69a190036ae4:1167126236): "From bounty + -ful."
登入就可以看每一支怎麼連回核心畫面。