1. The Greek prefix ek. signifying out of.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ez,
• ecn,
• ehco,
• esc,
• fc,
• rec,
• niec,
• eirc,
• eac,
• ey,
• lc,
• pec,
• ecpi,
• eacn,
• eacj,
• ek,
• qc,
• eck,
• erci,
• cerc

• DC,
• ecc,
• C,
• -ed,
• ex-,
• -er,
• dec.,
• e's,
• sec.,
• e,
• b.c.,
• echo,
• e-,
• n.c.,
• ecg,
• -ic,
• ECK,
• eec,
• -ey,
• nc,
• etc..

The adjective form of the word "ec" would be "eclectic".

The plural form of the word "ec" is "ecs"

The singular form of the word "ec" is "ec" itself. It does not change in singular or plural form.