single layer; one set; suit of clothes; set of nested boxes
Refers to a single layer of clothing, a suit, or a set of boxes that stack or nest together. The exact meaning depends on context.
A single-layer kimono is warm enough today.
This jubako is a single-tier set, a simple one with just one layer.
A compound of 一, “one,” and 重ね, “layer, set, or suit.” The reading is ひとかさね, without compound voicing.