| tolerating |
| tough(calm, strong, solid, steady, substantial) |
| unalterable(adjective, calm, strong, secure, flat) |
| unfailing(set, clear, certain, definite, fixed) |
| unquestioning(adjective, set, clear, complete, warm) |
| unremitting(adjective, stable, persistent, constant, continuous) |
| unshaken(adjective, set, clear, strong, flat) |
| unswerving(adjective, set, firm, total, solid) |
| abide |
| abode |
| adamant(adjective, strong, flat, intense, certain) |
| age-long |
| agreed(adjective, certain, limited, definite, fixed) |
| amaranthine(adjective, constant, endless, indefinite, lasting) |
| amenable(adjective, shy, meek, docile, obedient) |
| anchored(adjective, calm, strong, secure, firm) |
| ancient |
| antique |
| ardent(adjective, complete, warm, firm, total) |
| arranged(adjective, certain, limited, definite, fixed) |