scend verb & noun. 
[sɛnd] Also 
send. 
L15.[Origin uncertain: perh. aphet. from DESCEND, or rel. to SEND verb1.]A. verb intrans. Nautical. Of a vessel: pitch or surge up in a heavy sea. 
L15.b. noun.
1.  The driving impulse or surge of a wave or the sea. 
E18.2.  A sudden plunge or pitch of a vessel 
aft, forward, etc. 
M19.  [TahlilGaran] English Dictionary ▲