URGENT
URGENT is the six-letter answer. Trace URGENT from row 2, column 2, then go down to row 3, column 2 and down again to row 4, column 2. Turn right through row 4, column 3, continue right to row 4, column 4, then turn up to row 3, column 4. The letters read U → R → G → E → N → T.
This route is a compact bridge between the two sides of the board. It spans rows 2 through 4 and columns 2 through 4, with two direction changes across three straight segments. Its start at row 2, column 2 has three open orthogonal neighbors, and its end at row 3, column 4 also has three. Notice that row 4, column 3 supplies the E in the middle of the word and is the board’s only open cell in column 3.
For a position-by-position check, use this complete transcript: 1 at row 2, column 2; 2 at row 3, column 2; 3 at row 4, column 2; 4 at row 4, column 3; 5 at row 4, column 4; 6 at row 3, column 4. After URGENT is assigned, 15 open cells remain for the two longer answers.