From tsaphar and a word elsewhere unused meaning a swamp; a marsh-leaper, i.e. Frog -- frog.
see HEBREW tsaphar
H6854. tsephardea
צְפַרְדֵּעַ noun feminineExodus 8:2 (compare also AlbrZAW xv (1895), 322 Ges§§ 135o 145o) frogs (Arabic , etc.; Aramaic אוּרְדְּעָא עוּדְּעָנַיָּא,, ); — frogs, collective 8:2; Psalm 78:45; plural צִפַרְדְּעִים Exodus 7:27; Exodus 7:28; Exodus 7:29; Exodus 8:1; 8:3; 8:4; 8:5; 8:7; 8:8; 8:9; Psalm 105:30.
צֶ֫פֶת see II צפה.