- obdurate, adj. Dictionary lookup
hardened and unrepenting, stubborn, inflexible
- obfuscate, v. Dictionary lookup
to darken, to obscure, to muddle
- obsequious, adj. Dictionary lookup
excessivley willing to serve or obey, servile
- obstreperous, adj. Dictionary lookup
noisy, vociferous
- obtuse, adj. Dictionary lookup
not sharp or pointed, blunt; also, dull-witted
- officious, adj. Dictionary lookup
unnecessarily accommodating, meddlesome
- onerous, adj. Dictionary lookup
burdening, oppressive, laborious
- opaque, adj. Dictionary lookup
not letting light pass though, not reflecting light, hard to understand, obscure
- oscillate, v. Dictionary lookup
to swing to and fro, to be indecisive in purpose or opinion
- ossify, v. Dictionary lookup
to settle or fix rigidly into a practice, to become bone
- overwrought, adj. Dictionary lookup
overworked, fatigued, nervous, strained, excited