open (a store, shop, or restaurant)

work done for free, unpaid work, uncompensated work / work done in vain, work with no favorable end result

to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

HR department, personnel section

cumulative imposition (of obligation such as tax)

cumulatively impose (of obligation such as tax)

one's personal thoughts

private life, personal life

personal grudge