Avira, “bitachon” means security of any kind. “Kibbutz galuyot” means “the ingathering of the exiles”. “Keren kayemet” means that the principal will continue. You are confusing the meaning and the application. Some Hebrewwords changed over time as with every language. Forexample,a gabbai was a collector (from ligvot) and a chazzan was a President of a synagogue. He had to forsee (lachazot) its needs.
BTW, one erev Shabbat Ben-Yehuda wentto ask Rav Kook about the menaings of some words in the Gemara. Rav Kook told him that it was time forhim to do teshuv and he said “Maybe”. The next day he died. Dying on erev Shabbat is considered a good sign because the neshama first goes to Gan Eden (Ketubot 103b. According to the Arizal (Shaar ha-Gilgulim, Preface 23) it is spared chibbut hakever because Shabbat cleanses it. It should be even more so if one dies on Shabbat itself.