がっちり
JD1
(of the way in which something fits together) in a packed manner / tight / (of the way in which something fits together) closely / close-knit / (of the way in which something fits together) solidly / (of the way in which something fits together) tightly / solid / (of the way in which something fits together) in a compact manner / (of the way in which something fits together) in a close-knit manner / close