accruement comes from accrue + -ment, from Old French acroistre ('to increase'), from Latin accrēscere ('to grow'), from ad- ('to') + crēscere ('to grow'). Morphologically, the word is transparent: -ment is attached to the older base named in the history, so the modern form packages an inherited or borrowed stem inside a later English derivative. In modern use, the noun sense is "the process or result of accruing; an accumulation", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as accrue, accrual, accretion, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Latin accrēscere, Latin crēscere, which anchor the explanation in named linguistic material.