Denshi Jisho — Online Japanese dictionary

せき cough; coughing; tussis
Common word, Noun 
せき dam; weir; barrier; sluice
Common word, Noun 
せき 1: seat;
2: location (of a gathering, etc.); place;
3: position; post
Common word, Noun 
せき 1: (Mathematical term) product;
2: volume; area
Common word, Noun 
せき 1: (Sensitive) one's family register; one's domicile;
2: membership (club, party, etc.)
Common word, Noun, Noun suffix 
せき barrier; gate
Common word, Noun, Noun suffix 
せき 1: 18 ml (one-tenth of a go);
2: 0.033 meters square (one-hundredth of a tsubo);
3: dip; ladle
Noun 
せき responsibility; duty; obligation
Noun 
せき counter for ships
Counter 
せき 1: act (of a Chinese drama); scene;
2: paragraph (esp. of an Edo-period novel); passage; section
Noun 
ぜき honorific added to names of makuuchi and juryo division sumo wrestlers
Suffix, Honorific or respectful language, Abbreviation 
かんち concern; business
Common word, Noun, Suru verb 
かんよ participation; taking part in; participating in; being concerned in
Common word, Noun, Suru verb 
石碑 せき stone monument
Common word, Noun 
責務 せき duty; obligation
Common word, Noun 
石油 せき oil; petroleum; kerosene
Common word, Noun 
赤痢 せき dysentery
Common word, Noun, No-adjective 
赤緯 せき (astronomical) declination
Noun 
席画 せき impromptu drawing composed at a gathering
Noun 
潟湖 せき lagoon
Noun 
隻語 せき just a few words
Noun 
赤子 せき imperial children; imperial child
Noun, Archaism 
席次 せき order of seats; seating precedence; class standing
Noun 
昔時 せき old times; former times
Adverbial noun, Temporal noun 
席駄 せき leather-soled sandals (geta)
Noun 
雪駄 せき leather-soled sandals (geta)
Noun 

Found 493 words. Page one, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19

You can also

Look up kanji details for 関 せき.

Try a Yahoo Jisho search for 関 せき .
Try a Goo Jisho search for 関 せき .
Try a Google search for 関 せき .